Boyle, J.
We granted leave to appeal to address whether defendant was denied his right to counsel, whether review of a defendant’s sentence is available to the prosecution, and, if so, whether the Court of Appeals erred in ordering resentencing on the basis of a scoring error under the sentencing guidelines. An inference of ineffectiveness and prejudice on the basis of a thirty-day disciplinary suspension in a seven-month period of representation would violate controlling precedent of the United States Supreme Court and of this Court. Sixth Amendment claims based on defective performance must be established by showing constitutionally defective performance that undermines the reliability of the result. We hold that defendant has failed to overcome the presumption that counsel's performance was reasonable or to show that the deficiencies alleged prejudiced the outcome. We also hold that review of a sentence is available to the prosecution on the same terms as the defense. Therefore, because the guidelines do not have the force of law, the Court of Appeals erred in [148]*148ordering resentencing on the basis of a scoring error under the Michigan Sentencing Guidelines.1
We vacate the order of remand and affirm the decision of the Court of Appeals in all other respects.
I. FACTS
On October 3, 1988, decedent Raymond Harlin was the victim of an altercation that took place in defendant Charlie Mitchell’s apartment. Mr. Harlin was beaten with fists, a blackjack, brass knuckles, a baseball bat, and a woodcarving knife before he was shot. He jumped out the window of the third floor apartment and took a cab to Henry Ford Hospital where he died. The cause of death was gunshot wounds to the neck and back.
Defendant was charged with first-degree murder. MCL 750.316; MSA 28.548. Gerald Evelyn was appointed counsel for Mr. Mitchell on October 6, 1988, and represented him at the preliminary examination, on October 14, 1988. At the preliminary examination, the prosecution called Tyrone Thompson, and Mr. Evelyn actively interposed objections during his testimony and argued against the bindover. Mr. Evelyn represented defendant at the final conference on February 3, 1989. On April 5, six months after appointment, Mr. Evelyn received a disciplinary suspension which expired May 5, 1989.
[149]*149Trial began on May 8, 1989. Tyrone Thompson testified as he had at the preliminary hearing that defendant was the leader of a drug ring and gave the order to shoot Mr. Harlin, which was carried out by codefendant Lamont Mason. Defendant Mitchell did not take the stand, and counsel contended in closing argument that Mr. Thompson’s testimony that defendant ordered the killing was equivocal and that the prosecution had failed to carry the burden of proof beyond a reasonable doubt.
Before trial, defendant wrote six letters to the trial judge, the chief judge, and others, requesting removal of counsel. Defendant complained that Mr. Evelyn had not visited him at the Wayne County jail, instead only meeting with him in the “bullpen” at the Recorder’s Court. Defendant also believed that there vyere certain motions that Mr. Evelyn needed to make before the time to do so expired. On April 27, 1989, eleven days before jury selection was to begin, defendant appeared before the court in propria persona for a hearing on defendant’s “motion for withdrawal of counsel.” Defendant informed the judge on the record that he did not believe counsel was responsive to his concerns, and that counsel had been suspended from practice for thirty days from April 5, 1989, to May 5, 1989.2 Counsel was officially reinstated on May 8, 1989, the day jury selection in defendant’s trial began. That day, Mr. Evelyn advised the court that defendant wanted him removed and had filed a grievance against him. Counsel did not indicate that he was unprepared.
[150]*150The judge had taken the April 27 motion under advisement pending receipt of a response from Mr. Evelyn. The issue was revisited on Tuesday, May 9, the second day of jury selection. Mr. Evelyn advised the court that “as of yesterday evening,” at the conclusion of proceedings, defendant was satisfied with his representation; but, because he had been unable to visit him in the jail that evening, defendant would like him removed as counsel. Mr. Evelyn stated that he had talked with defendant on numerous occasions. The court found nothing that would warrant a change of counsel, nor would the court “abort” the proceedings.
The defendant confirmed that he had received copies of the prosecutor’s file in the instant case and another pending case and his transcripts3 in March, but stated that counsel’s failure to discuss matters with him had led to specific deficiencies, which he detailed. The court directed counsel to confer with defendant and to evaluate and report back regarding any motions defendant might wish to be heard, and Mr. Evelyn’s professional opinion regarding whether they were appropriate. The motion was denied without prejudice.
Thereafter, the defendant’s concerns over evidence seized at the apartment building from apartment 302,4 and the validity of the search warrant with regard to apartment 302 were resolved to defendant’s satisfaction with a stipulation in which the parties agreed that none of the evidence from apartment 302 except the weapons involved would be admitted. Defendant [151]*151also expressly waived his right to a Walker5 hearing for the purpose of suppressing his statement. On Monday, May 15, 1989, Mr. Evelyn informed the court that he had received a grievance filed by the defendant on May 1. Defendant stated he was satisfied with counsel’s resolution of his concerns and wanted to withdraw the grievance.6
Following defendant’s conviction on May 17, 1989, of second-degree murder,7 MCL 750.317; MSA 28.549, defendant appealed, and the Court of Appeals remanded the case for a Ginther8 hearing. Trial counsel was not called as a witness, and the trial court held that defendant had not shown objective unreasonableness, or prejudice as required by People v Pickens, 446 Mich 298; 521 NW2d 797 (1994). Thereafter, the Court of Appeals affirmed defendant’s conviction, and on the cross appeal by the people, found error in the scoring of certain offense variables under the sentencing guidelines in which ten points had [152]*152been allocated under offense variable three — “Intent to Kill or Injure” (ov 3), and zero points under offense variable four — “Aggravated Physical Injury” (ov 4). The Court of Appeals ordered the case remanded to the trial court for resentencing consistent with the panel’s rescoring of twenty-five points on OV 3 and twenty-five points on ov 4. Defendant sought leave to appeal his conviction and the order of remand in this Court.
We granted leave, limiting the issues to whether defendant was denied counsel or effective assistance and whether and to what extent a prosecutor may appeal sentencing errors. 450 Mich 993 (1996).
H. THE RIGHT TO COUNSEL: GOVERNING PRINCIPLES
“It has long been recognized that the right to counsel[9] is the right to the effective assistance of counsel.” McMann v Richardson, 397 US 759, 771, n 14; 90 S Ct 1441; 25 L Ed 2d 763 (1970). However, because “the right to the effective assistance of counsel is recognized not for its own sake, but because of the effect it has on the ability of the accused to receive a fair trial, [a]bsent some effect of [the] challenged conduct on the reliability of the trial process, the Sixth Amendment guarantee is generally not implicated.” United States v Cronic, 466 US 648, 658; 104 S Ct 2039; 80 L Ed 2d 657 (1984).
[153]*153The cases interpreting the right to the meaningful assistance of counsel as it affects the right to a fair trial, “present a continuum.” United States v DeCoster, 199 US App DC 359, 364; 624 F2d 196 (1976). Cases on the continuum proceed from “structural or procedural impediments by the state that prevent the accused from receiving the benefits of the constitutional guarantee,” id., to cases where the “issue is counsel’s performance when he is ‘untrammelled and unimpaired’ by state action.” Id. at 365. The companion cases of Cronic and Strickland v Washington, 466 US 668; 104 S Ct 2052; 80 L Ed 2d 674 (1984), reflect this continuum.
CRONIC10
Cases on the continuum range from actual to constructive denial of counsel to instances where the performance of counsel is so deficient that there has been a functional denial of counsel guaranteed by the Sixth Amendment. The methods of analysis employed to determine whether there has been a denial of the constitutional right likewise range from the general to the particular. Cronic reviews the cases in which the courts have found a Sixth Amendment
[154]*154violation without inquiry into whether the outcome was reliable. “The most obvious example is, of course, the failure of the state to provide any counsel whatever.” DeCoster at 364; see also Cronic at 659 (“a trial is unfair if the accused is denied counsel at a critical stage of his trial”). Equally obvious would be the case in which counsel is provided but does nothing, that is, “no actual ‘Assistance’ ‘for’ the accused’s ‘defence’ is provided,” in that “counsel entirely fails to subject the prosecution’s case to meaningful adversarial testing . . . .” Cronic at 654, 659. A prophylactic approach also has been applied to cases in which the court or the state directly interferes with the attorney-client relationship by preventing counsel from rendering assistance. See, e.g., Geders v United States, 425 US 80; 96 S Ct 1330; 47 L Ed 2d 592 (1976) (order prohibiting counsel from conferring with defendant during overnight recess while defendant was testifying); Crutchfield v Wainwright, 803 F2d 1103 (CA 11, 1986) (en banc) (order denying right to confer during trial recess).11 Because these “circumstances . . . are so likely to prejudice the accused that the cost of litigating .their effect in a particular case is unjustified,” courts are “require[d] ... to conclude that a trial [under such circumstances] is [155]*155unfair . . . Cronic at 658-659. In these cases, prejudice is presumed. Id.
Next on the continuum are the rare cases in which the circumstances are such that “although counsel is available to assist the accused during trial, the likelihood that any lawyer, even a fully competent one, could provide effective assistance is so small that a presumption of prejudice is appropriate without inquiry into the actual conduct of the trial.” Cronic at 659-660; Powell v Alabama, 287 US 45; 53 S Ct 55; 77 L Ed 158 (1932). As in instances where the state has by statute or order interfered with the attorney-client relationship, the inquiry focuses not on counsel’s performance at trial, but on whether the surrounding circumstances are so likely to have prejudiced the accused that particularized inquiry into the fairness of the result is unjustified. Where the circumstances are not of such “magnitude,” Cronic at 659, n 26, that there has been an “actual breakdown of the adversarial process during the trial of the case,” id. at 657-658, a defendant “can . . . make out a claim of ineffective assistance only by pointing to specific errors made by trial counsel.” Id. at 666. Thus, at the far end of the continuum opposite an actual denial of counsel are those cases in which the “issue is counsel’s performance.” DeCoster at 365. Here, the inquiry is particular, not general, and the question is whether counsel’s actual performance undermines confidence in the reliability of the result.
STRICKLAND/PICKENS
The benchmark case describing the standard for claims of actual ineffective assistance of counsel in Michigan is People v Pickens, supra at 318, which [156]*156held that the right to counsel under the Michigan Constitution does not justify a more restrictive standard than that applied under the United States Constitution and adopted the Supreme Court’s test in Strickland. That test requires the greatest level of factual inquiry into the actual conduct of the defense and its effect on the outcome of the trial. It places the burden on the defendant to show, with regard to counsel’s performance,
that counsel made errors so serious that counsel was not functioning as the “counsel” guaranteed the defendant by the Sixth Amendment . . . [and] that the deficient performance prejudiced the defense. This requires showing that counsel’s errors were so serious as to deprive the defendant of a fair trial, a trial whose result is reliable. Unless a defendant makes both showings, it cannot be said that the conviction or death sentence resulted from a breakdown in the adversary process that renders the result unreliable. [Strickland at 687.]
In applying this test, “a court must indulge a strong presumption that counsel’s conduct falls within the wide range of reasonable professional assistance . . . .” Id. at 689. Whereas cases at the other end of the continuum indulge a presumption that defendant was prejudiced by counsel’s absence or inertness, or by state interference or other surrounding circumstances as egregious as those found in Powell, cases decided under the Strickland/Pickens test require the defendant to “overcome the presumption that, under the circumstances, the challenged action ‘might be considered sound trial strategy.’ ” Strickland at 689.
[157]*157m. APPLYING CRONIC
The defendant argues, and the dissent agrees, that a thirty-day suspension of trial counsel during a seven-month period of representation is a circumstance making it so unlikely that any lawyer could provide effective assistance that “a total denial of counsel during the critical pretrial period” occurred, post at 191.12 However, in Cronic, supra, the Court distinguished cases recognizing a presumption of prejudice from claims of ineffective assistance based on defects in performance grounded in allegations of inadequate preparation. The Court rejected the prophylactic approach and held that such claims and other specific claims of a given lawyer’s incompetence at trial either individually or in combination did not justify an inference that the right to counsel had been violated.
Under the test employed by the Court of Appeals, reversal is required even if the lawyer’s actual performance was flawless. By utilizing this inferential approach, the Court of Appeals erred. [Id. at 652-653.]
In Strickland, in which the claims of defective performance included, inter alia, counsel’s failure to investigate and present character witnesses, Justice O’Connor set forth the test applicable to such a claim. As noted above, the Strickland test applied in Michigan requires that a defendant claiming ineffective assistance based on defective performance has the [158]*158burden of showing that counsel’s performance fell below an objective standard of reasonableness and that there is a reasonable probability that but for the unprofessional errors the result of the proceeding would have been different.
The Supreme Court has rejected a categorical prophylactic approach to claims of counsel’s deficient performance and of failure to adequately prepare or investigate in favor of an inquiry into actual performance and prejudice. As Professors LaFave and Israel have noted, “If the Supreme Court had not clearly so indicated [previously], its subsequent opinions in . . . Cronic and Strickland . . . established without doubt its rejection of any such across-the-board categorical approach.” 2 LaFave & Israel, Criminal Procedure, § 11.7, p 25 (1991 Supp). “Read in conjunction with Cronic, Strickland leaves no doubt that a strictly judgmental approach applies to ineffectiveness claims based upon the incompetent performance of counsel.” Id., § 11.10 at 45. To justify reversal under both the United States and Michigan Constitutions, defendant must affirmatively demonstrate that counsel’s performance was objectively unreasonable and so prejudicial as to deprive him of a fair trial.
The dissent attempts to avoid application of this precedent by relying on the examples given in Cronic of cases in which prejudice is presumed and variously characterizing the claim as a circumstance making it unlikely that any lawyer could provide effective representation, as a constructive denial of counsel, or as a denial of counsel combined with a failure to grant a continuance. Dealing with the theories in inverse order, Morris v Slappy, 461 US 1; 103 S Ct 1610; 75 L Ed 2d 610 (1983), demonstrates that the suggestion [159]*159that defendant’s right to counsel was violated because the trial court should have granted a continuance13 is error. In Morris, the defendant claimed a constitutional violation in the trial court’s failure to grant a continuance when his original assigned counsel was scheduled for surgery and new counsel was substituted six days before the trial. The court of appeals held that the defendant’s Sixth Amendment right to counsel had been violated and that this violation required reversal without any showing of prejudice. The Supreme Court reversed, finding that the court of appeals had “misread the record and the controlling law and announced a new constitutional standard which is unsupported by any authority.” Id. at 12. Importantly to resolution of the instant case, the Supreme Court observed that
[n]ot every restriction on counsel’s . . . opportunity to investigate ... or otherwise to prepare for trial violates a defendant’s Sixth Amendment right to counsel. . . . [0]nly an unreasoning and arbitrary “insistence upon expeditiousness in the face of a justifiable request for delay” violates the right to the assistance of counsel. [Id. at 11-12.]
To the extent that the dissent characterizes Mr. Evelyn’s thirty-day suspension as an external constraint constituting a constructive denial of counsel, the conclusion is refuted by Cronic, on which the dissent purports to rely. The Court overturned the court of appeals decision in Cronic, which held precisely, as would the dissent here, that “when circumstances hamper a given lawyer’s preparation of a defendant’s case, the defendant need not show specified errors in [160]*160the conduct of his defense in order to show ineffective assistance of counsel.” United States v Cronic, 675 F2d 1126, 1128 (CA 10, 1982). The Supreme Court expressly held that the Tenth Circuit Court had erred in finding that claimed external constraint on a given lawyer’s trial counsel's performance — the district court’s decision to give counsel only twenty-five days to prepare for trial — created an inference of ineffectiveness and that reversal was required.
The fact that the accused can attribute a deficiency in his representation to a source external to trial counsel does not make it any more or less likely that he received the type of trial envisioned by the Sixth Amendment, nor does it justify reversal of his conviction absent an actual effect on the trial process or the likelihood of such an effect. [Cronic, 466 US 662, n 31.]
The Court in Cronic also specifically found that allegations of deficient performance due to allegedly inadequate time to prepare were not the type of circumstances justifying a presumption of prejudice as in Powell v Alabama,14 and specifically observed that the case did not involve a finding that the defendant [161]*161was deprived of the presence of counsel at a critical stage of the trial. Cronic at 664. Neither Cronic nor this case involves a total denial of counsel during a critical stage of the proceedings or interference by the trial court with the attorney-client relationship.15 Geders, supra. The Court concluded that allegations of inadequate preparation and investigation under the Sixth Amendment arising from the court-imposed twenty-five days to prepare did not “even arguably” justify a presumption of inability to prepare to meet the bona fide issue of criminal intent. Cronic at 664. Likewise, an allegation of deficient performance stemming from a thirty-day suspension coupled with six-months time for preparation does not justify a pre[162]*162sumption.16 These are not circumstances making it so likely that “no lawyer could provide the respondent with the effective assistance of counsel required by the Constitution,” id., that examination of the actual performance of counsel or prejudice is irrelevant.17
IV. APPLYING STRICKLAND
A. THE CINTHER EVIDENCE
There is no factual basis for a conclusion that counsel’s performance was constitutionally deficient [163]*163and undermines confidence in the reliability of the verdict.
“A convicted person who attacks the adequacy of the representation he received at his trial must prove his claim. To the extent his claim depends on facts not of record, it is incumbent on him to make a testimonial record at the trial court . . . which evidentially supports his claim and which excludes hypotheses consistent with the view that his trial lawyer represented him adequately.” [People v Ginther, 390 Mich 436, 442-443; 212 NW2d 922 (1973).]
No record was made regarding what Mr. Evelyn did or did not do, or whether Mr. Evelyn knew of the alleged eyewitnesses.18 Counsel’s failure to call witnesses is presumed to be trial strategy, Strickland, supra; Ginther, supra, and Mr. Evelyn was not called to testify at the Ginther hearing. Testimony of the three witnesses who were found by the trial court to be “inconsistent and contradictory of one another” did not exclude the hypotheses of adequacy.
The dissent offers no support for the conclusion that there was any legally viable challenge to the admissibility of the evidence,19 and the witnesses subject to being called were not eyewitnesses. While the dissent concludes that Mr. Evelyn failed to investigate and that “no reasonable trial strategy exists” for this “failure,” post at 189, n 4, the dissent offers no analysis with respect to how these witnesses might have made a difference at trial.
[164]*164[T]he Sixth Amendment does not require that counsel do what is impossible or unethical. If there is no bona fide defense to the charge, counsel cannot create one and may disserve the interests of his client by attempting a useless charade. [Cronic at 656, n 19.]
The only bona fide jury issue open to competent defense counsel on these facts was that the government’s witnesses were unworthy of belief and that the state had failed to carry the burden of proof.20 This is precisely what Mr. Evelyn argued,21 an argument that persuaded the trial court to direct a verdict on first-degree murder.22
B. PERFORMANCE/PREJUDICE
In Pickens, we adopted the test set forth by the United States Supreme Court in Strickland. The reviewing court is to determine (1) whether counsel’s performance was objectively unreasonable, and (2) whether the defendant was prejudiced by counsel's defective performance. Id. at 687. The first prong requires that counsel make “errors so serious that counsel was not functioning as the ‘counsel’ guaran[165]*165teed the defendant by the Sixth Amendment.” Id. The second requires that “counsel’s ineffective assistance must be found to have been prejudicial in order to reverse an otherwise valid conviction.” Pickens at 314.
Defendant’s claims of ineffective assistance fail on both scores. Nothing in the record indicates that counsel erred in not calling witnesses who were not present when the victim was shot and whose testimony, at best, would have affected only matters collateral to the prosecutor’s theory that the defendant, as leader of a drug ring, gave the order to kill Mr. Harlin.23
Any claim that the probability is high that had Nelson and Woodson been called defendant would have been acquitted underscores the record deficiencies the dissent ignores. Whether the witnesses were known to counsel or, if known, would have been deemed by him to be believable by the jury is unknown. It is far from evident, however, that the tes[166]*166timony of two persons who allegedly happened to be merely present playing chess in a dope house at 10:00 P.M. would be credited by the factfinder. For precisely this reason, Mr. Evelyn’s testimony was critical to a proper assessment of the claim. As the Court observed in Strickland:
[W]hen a defendant has given counsel reason to believe that pursuing certain investigations would be fruitless or even harmful, counsel’s failure to pursue those investigations may not later be challenged as unreasonable. In short, inquiry into counsel’s conversations with the defendant may be critical to a proper assessment of counsel’s investigation decisions, just as it may be critical to a proper assessment of counsel’s other litigation decisions. [Id. at 691.]
Counsel may have failed to call the witnesses because he did not know about them. Alternatively, he may not have called them because of a familiar strategic consideration, namely, that calling witnesses whose testimony is not believable (even with regard to peripheral matters), may jeopardize an otherwise viable defense. On this record, there is no basis to conclude that the failure to present these witnesses was error or that, had the witnesses been presented, “the factfinder would have had a reasonable doubt respecting guilt.” Strickland, supra at 695.
The dissent’s conclusion that Mr. Evelyn’s performance at trial is irrelevant, post at 199,24 ignores teaching of the United States Supreme Court that “the appropriate inquiry focuses on the adversarial process, not on the accused’s relationship with his law[167]*167yer as such. If counsel is a reasonably effective advocate, he meets constitutional standards irrespective of his client’s evaluation of his performance.” Cronic at 657, n 21.25 Unless the defendant shows a reasonable probability that, but for counsel’s unprofessional errors, the result of the proceeding would have been different, a Sixth Amendment violation has not been established.
The dissent would improvidently extend a remedy to a defendant who received constitutionally effective assistance and who has not been wronged in any real sense.26 As the Court observed in Strickland, when rejecting a presumption of ineffectiveness regarding [168]*168alleged individual deficiencies in performance by counsel representing defendants in a criminal trial:
Criminal trials resolved unfavorably to the defendant would increasingly come to be followed by a second trial, this one of counsel’s unsuccessful defense. Counsel’s performance and even willingness to serve could be adversely affected. Intensive scrutiny of counsel and rigid requirements for acceptable assistance could dampen the ardor and impair the independence of defense counsel, discourage the acceptance of assigned cases, and undermine the trust between attorney and client. [Id. at 690.]
Justice Riley’s observation in Pickens is also apt:
[T]he inevitable result of such a formulation would be an explosion of civil litigation in which juries would be permitted to award damages to a defendant who by definition has been reliably found guilty . . . [t]hat such a perversion of the truth-seeking function of criminal trials was not intended by the Michigan Constitution is beyond question. [Id. at 325-326, n 31.]
V. THE LIMITS OF APPELLATE REVIEW
A reality underlying the Cronic-Strickland continuum is the inability of an appellate court to evaluate in hindsight the infinite variables of trial court practice and the “countless ways to provide effective assistance in any given case.” Id. at 689. For the same reason, the attorney-client privilege is waived and the trial lawyer is a necessary witness on the issue of inadequacy of counsel:
At the hearing, the witness, Williams and Williams’ lawyer are all necessary witnesses. The lawyer is necessary because even the truth and further elaboration of the witness’ assertions would not necessarily require a finding of [169]*169inadequacy of counsel. By putting in issue the effectiveness of the representation he received at the trial, Williams waived the attorney-client privilege. [People v Michael Williams, 391 Mich 832, 832 (1974).[27]
Absent any presentation of counsel’s testimony to the trial court, or an inquiry into whether defendant was prejudiced by the suspension, reversal of the trial court’s conclusion that the defendant failed to carry his burden at the Ginther hearing would be postulated not on truth but on pure conjecture. The dissent’s approach, despite the holdings in Williams, Ginther, Cronic, Strickland, Pickens, and People v Pubrat, 451 Mich 589; 548 NW2d 595 (1996), would permit defense lawyers to be “found guilty” of ineffective assistance without ever being heard from and face the unenviable prospect of looking to the prosecutor to protect them at the Ginther hearing.28
We do not know that Mr. Evelyn did not “exert at least some effort to explore the truth . . . .” Post at 191, n 7. We do not even know that Mr. Evelyn failed to prepare with regard to the Ginther hearing witnesses. We do know that Mr. Evelyn prepared by holding the preliminary examination and obtaining discovery and that he obtained a directed verdict of [170]*170not guilty of first-degree murder. Mr. Evelyn should not be deemed guilty of malpractice without his having been given the opportunity to be heard, nor should the defendant be afforded a new trial without record basis for a finding that his conviction was unfairly obtained.29
In the real world, defending criminal cases is not for the faint of heart. Lawyers must fulfill ethical obligations to the court, zealously advocate the client’s best interests (which includes establishing that they, and not the client, are in charge of making the professional decisions), and protect themselves against grievances30 and claims of malpractice. Lawyers will inevitably make errors in the process, but, because both cases and attorneys come in an infinite variety of configurations, those errors can only rarely be [171]*171defined “with sufficient precision to inform defense attorneys correctly just what conduct to avoid.” Strickland at 693. Thus, the Sixth Amendment guarantees a range of reasonably competent advice and a reliable result. It does not guarantee infallible counsel.
An inference of constitutional ineffectiveness cannot be established on the basis of the “circumstance” of counsel’s thirty-day suspension during seven months of representation, without any inquiry into the conduct of the trial or any record being developed regarding counsel’s actual preparedness and its effect on the result.
vi. appellate counsel
Defendant also claims appellate counsel was ineffective in failing to call trial counsel at the Ginther hearing. There is no better evidence for why this claim should be rejected than the dissent’s holding that ineffectiveness may be inferred without the inquiry into performance and prejudice, which presumes that counsel’s conduct fell within the wide range of reasonable professional assistance.
Appellate counsel had an obvious strategic reason for not calling trial counsel. That reason was that if trial counsel had been called, his explanation for his actions might have been more believable than the testimony of the witnesses offered at the Ginther hearing. Appellate counsel may have failed to call trial counsel at the Ginther hearing because he determined trial counsel would have testified that he did not have notice of the witnesses or that he had a strategic reason for not presenting them (such as credibility or relevance). In any event, because these are [172]*172strategic decisions, there is no basis to conclude appellate counsel was constitutionally ineffective.
VII. PROSECUTOR’S RIGHT TO APPEAL
A. SENTENCING REVIEW
In People v Coles, 417 Mich 523; 339 NW2d 540 (1983), this Court, by unanimous vote of all justices participating,31 recognized a defendant’s right to appellate review of a sentence. The Court held:
[A] sentence following a conviction is as much a part of the final judgment of the trial court as is the conviction itself. Since the Court of Appeals has jurisdiction to hear appeals of final judgments of trial courts, . . . the Court of Appeals has jurisdiction to hear appeals involving a review of a defendant’s sentence. [Id. at 535.]
In 1988, the Legislature amended MCL 770.12; MSA 28.1109 to expressly provide for prosecutorial appeals of right and by leave “if the protection against double jeopardy [under the state and federal constitutions] would not bar further proceedings against the defendant . . . .” Reviewing the statute last term, we held that it was enacted “to give the people the same essential right to appeal and seek leave as a defendant enjoys, within the limits of the constitutional prohibition against double jeopardy.” People v Torres, 452 Mich 43, 55; 549 NW2d 540 (1996). It follows that both the prosecutor and the defendant may appeal the sentence under Coles, supra; MCL 770.12; MSA 28.1109.32
[173]*173B. REVIEW OF GUIDELINES CALCULATIONS
Defendant argues, essentially, that a defendant’s right to appeal a sentence on the basis of an erroneous guidelines score is grounded in the due process right to be sentenced on the basis of accurate information. Townsend v Burke, 334 US 736; 68 S Ct 1252; 92 L Ed 1690 (1948). Because due process protects only individuals against state authority, defendant contends that the state cannot assert a right to a rule of symmetry with regard to sentencing appeals.
The holding in Townsend is inapposite. First, in Townsend, the United States Supreme Court held that there is no basis for the assertion of a due process right to be sentenced on correct information unless the sentence is based on an “extensively and materially false” foundation. Townsend, supra at 741. The misapplication of the guidelines typically advanced is not premised on a false foundation. The claim advanced is that the guidelines were misapplied because the instructions were not. properly interpreted or because an undisputed foundation is “insufficient” to support the score. These claims do not rest on allegations of falsify or lack of factual foundation. They would be claims of legal error if guidelines had the force of law.33
[174]*174More fundamentally, reference to the constitutional guarantee of procedural due process at sentencing does not address the principal question presented, which is whether either a defendant or a prosecutor has a substantive right to challenge a guideline miscalculation or misinterpretation, which does not have the force of law. Unlike the federal system, in which the sentencing guidelines are substantive law promulgated pursuant to an act of Congress, 28 USC 994(a) (authorizing promulgation of federal sentencing guidelines by United States Sentencing Commission), or those sister states in which guidelines have been adopted by the legislature, current guidelines used by the trial courts in Michigan exist solely as a result of Administrative Order No. 1988-4.34 As explained in [175]*175People v Milbourn, 435 Mich 630, 656-657; 461 NW2d 1 (1990):
[W]e believe that the second edition of the sentencing guidelines is the best “barometer” of where on the continuum from the least to the most threatening circumstances a given case falls.
Nevertheless, because our sentencing guidelines do not have a legislative mandate, we are not prepared to require adherence to the guidelines. [Emphasis in the original.]
Simply stated, because this Court’s guidelines do not have the force of law, a guidelines error does not violate the law.35 Thus, the claim of a miscalculated variable is not in itself a claim of legal error.36
[176]*176We have long recognized and recently reaffirmed that a sentence may be set aside only when it is invalid. People v Whalen, 412 Mich 166, 169-170; 312 NW2d 638 (1981); In re Jenkins, 438 Mich 364, 373; 475 NW2d 297 (1991). In Jenkins, we observed in dicta that the defendant may challenge the scoring of the sentencing guidelines under MCR 6.429; and in People v Hernandez, 443 Mich 1; 503 NW2d 629 (1993), and People v Walker, 428 Mich 261; 407 NW2d 367 (1987), we discussed preservation of guidelines scoring issues. To the extent that our decisions have been construed to authorize review and reversal for scoring errors or errors of misinterpretation, Milbourn’s correct observation that guidelines do not have the force of law is controlling. Such relief is unavailable.37
The challenge here asserted is directed not to the accuracy of the factual basis for the sentence, but, rather, to the judge’s calculation of the sentencing variable on the basis of his discretionary interpretation of the unchallenged facts. The challenge does not state a cognizable claim for relief. There is no juridi[177]*177cal basis for claims of error based on alleged misinterpretation of the guidelines, instructions regarding how the guidelines should be applied, or misapplication of guideline variables.38
As emphasized in Milboum, the guidelines are vehicles to assist the trial judge regarding where a given defendant falls on the sentence continuum recognized by Milboum. Where the guidelines calculation differs from the trial court’s intended sentence, the judge is alerted that the sentence falls outside a normative range and should be evaluated to assure that it is not unfairly disparate, has a rational basis, and is not disproportionate.39 On postsentence review, guidelines departure is relevant solely for its bearing on the Milboum claim that the sentence is disproportionate.40 Thus, application of the guidelines states a cognizable claim on appeal only where (1) a factual predicate is wholly unsupported, (2) a factual predicate is materially false, and (3) the sentence is disproportionate.41
[178]*178Appellate courts are not to interpret the guidelines or to score and rescore the variables for offenses and prior record to determine if they were correctly applied. Guidelines are tools to aid the trial court in the exercise of its authority and a framework for the appellate courts’ inquiry into the question whether the sentence is disproportionate and, hence, ah abuse of the trial court’s discretion. The Court of Appeals erred in reversing defendant’s sentence.
vm. conclusion
For the reasons stated above, we affirm the decision of the. Court of Appeals that defendant was not deprived of the effective assistance of counsel and vacate its order remanding this case to the trial court for resentencing.
Brickley and Riley, JJ., concurred with Boyle, J.