WILLIAM A. BABLITCH, J.
¶ 1. Ernesto L. Acosta, M.D. and his attorney, George Burnett, appeal a decision of the court of appeals requiring Dr. Acosta [79]*79to answer a certain question posed to him at a deposition and affirming sanctions on Burnett for instructing Dr. Acosta not to answer it. Burnett claims that the question posed required the expert opinion of Dr. Acosta and that Dr. Acosta, although an expert, was not required to answer it. He argues that the sanctions were an erroneous exercise of the circuit court's discretion because he was substantially justified in directing his client not to answer. We agree. Accordingly, the decision of the court of appeals is reversed.
¶ 2. The plaintiffs, Dawn and Mark Alt and their son, Cody Alt, for the first time on appeal have requested that this court issue a supervisory writ ordering the circuit court to enter a default judgment against defendants as a sanction for alleged discovery abuses. We deny granting a supervisory writ because in addition to failing to follow the proper procedure, plaintiffs have not made a sufficient showing to justify a supervisory writ.
¶ 3. The issues in this case arise from a deposition taken of Dr. Acosta by the plaintiffs when, at the direction of his attorney Mr. Burnett, Dr. Acosta refused to answer the question, "No matter what the cause, a patient with a history of term pregnancy and a gush ofblood[,] that's abnormal?" The refusal presents three issues: 1) Did the question require the expert opinion of Dr. Acosta? 2) If so, did Dr. Acosta have a legal privilege to refuse to answer it? 3) Were the sanctions imposed by the circuit court on attorney Burnett for directing Dr. Acosta to refuse to answer an erroneous exercise of discretion?
¶ 4. These issues generate from a case with a complex history. On October 2, 1989, plaintiff Dawn Alt went into labor and by a cesarean section performed by Dr. Richard S. Cline, gave birth to Cody Alt. [80]*80Cody was born with catastrophic injuries including brain injury and other severe temporary and permanent injuries. Cody's parents, Dawn and Mark Alt, and Cody, by his guardian ad litem (collectively the "Alts" or "plaintiffs"), sued various parties including Dr. Cline who performed the cesarean section delivery, and the medical clinic at which Dawn Alt delivered the baby. The Alts alleged that the defendants were negligent in their duties in the delivery of Cody.
¶ 5. During discovery, the plaintiffs named a number of medical doctors as expert witnesses, including Dr. Acosta. Dr. Acosta had provided prenatal care to Dawn and wrote her discharge summary after Cody Alt's birth. Dr. Acosta was not present at Cody's delivery, and he was not named as a defendant in the case.
¶ 6. At his first deposition on September 20, 1993, Dr. Acosta appeared with attorney Paul Grim-stad who represented Dr. Cline and the medical clinic. The deposition ended when plaintiffs' and defendants' attorneys disagreed regarding a line of questioning which Grimstad characterized as requesting Dr. Acosta's expert opinion rather than a recounting of his personal observations.
¶ 7. The plaintiffs then filed a motion to compel discovery and to remove Grimstad as counsel for Dr. Acosta. The Outagamie County Circuit Court, Judge Dee R. Dyer, presiding, granted the motion, determining that the line of questioning in dispute was proper and disqualifying Grimstad as Dr. Acosta's counsel. The circuit court also imposed sanctions against Grim-stad. The court of appeals affirmed.1
¶ 8. Dr. Acosta then hired his own counsel, attorney George Burnett. In a series of correspondence [81]*81between Burnett and plaintiffs' counsel, Burnett attempted to clarify the scope of questions that would be posed to Dr. Acosta at a second deposition. Plaintiffs' counsel, attorney Thomas K. Guelzow and guardian ad litem, attorney James A. Johnson, indicated that absent a protective order, they would question Dr. Acosta to the full extent allowed by Wisconsin's liberal discovery rules. Attorney Burnett did not request a protective order.
¶ 9. Dr. Acosta's second deposition on July 23, 1996, again ended when attorney Burnett directed Dr. Acosta to not answer questions that he asserted asked for information based on Dr. Acosta's expert opinion rather than his personal observations. Specifically, Burnett objected to the following questions:
Q. And if you were the OB that was treating this woman at the timé knowing that there had been an ultrasound done and wanting to see that report, what would you have done?
... [and],..
Q. No matter what the cause, a patient with a history of term pregnancy and a gush of blood[,] that's abnormal?
¶ 10. Plaintiffs' counsel again filed a motion, requesting an order to co'mpel discovery and for sanctions. The circuit court made its decision orally from the bench during the motion hearing. The court determined that the first question regarding what Dr. Acosta would have done need not be answered. That determination is not the súbject of this appeal. It is the second question that is before us. The court determined that the second question regarding whether a gush of blood was abnormal should have been answered.
[82]*82¶ 11. The circuit court also granted plaintiffs' motion for an order imposing sanctions pursuant to Wis. Stat. § 804.12(2) and imposed sanctions of $2,335 against Burnett.
¶ 12. Dr. Acosta and Burnett appealed, and the court of appeals affirmed both circuit court orders. Burnett v. Alt, 215 Wis. 2d 203, 214, 216, 572 N.W.2d 895 (Ct. App. 1997).
¶ 13. Burnett and Dr. Acosta petitioned this court for review. Plaintiffs also petitioned this court for a supervisory writ pursuant to Wis. Stat. §§ (Rule) 809.51 and 809.71, ordering the circuit court to enter a default judgment against defendants on the grounds of discovery abuse. This court granted both petitions.
¶ 14. In addition to the issue regarding the supervisory writ, which we do not grant, three issues are presented: 1) Did the question posed to Dr. Acosta require his expert opinion? We hold that it did. 2) Did Dr. Acosta, a non-party physician, have a legal privilege to refuse to answer it? We hold that under the circumstances presented he did. 3) Did the circuit court erroneously exercise its discretion in imposing sanctions against Burnett for directing Dr. Acosta to not answer the allegedly objectionable question? Because Dr. Acosta was not required to answer the question, attorney Burnett was substantially justified in directing him not to answer it. Therefore, we hold that the circuit court erroneously exercised its discretion in imposing sanctions. Accordingly, we reverse the court of appeals' decision.
f — Í
¶ 15. We must first determine whether the question posed to Dr. Acosta asked for his expert opinion. At the second deposition of Dr. Acosta on July 23,1996, he [83]*83was asked the following question: "No matter what the cause, a patient with a history of term pregnancy and a gush of blood[,] that's abnormal?" Stated another way, the question in essence was: "Is a gush of blood occurring to a patient with a history of term pregnancy an abnormal condition?"
¶ 16. A circuit court has discretion whether to compel discovery. Borgwardt v. Redlin, 196 Wis. 2d 342, 350, 538 N.W.2d 581 (Ct. App. 1995). This court will uphold a discretionary decision if the court reviewed the facts and applied the proper standard of law. Id. However, to determine whether the circuit court applied the proper standard of law in this case, we must determine whether the question asked for Dr. Acosta’s expert opinion.
¶ 17. A question asks for expert testimony if it requires "scientific, technical, or other specialized knowledge," Wis. Stat. § 907.02 (1993-94),2 to answer the question. Such specialized knowledge is that which is not within the range of ordinary training or intelligence. State v. Johnson, 54 Wis. 2d 561, 564, 196 N.W.2d 717 (1972) (citing Pollock v. Pollock, 273 Wis. 233, 77 N.W.2d 485 (1956) and Cramer v. Theda Clark Mem. Hosp., 45 Wis. 2d 147, 172 N.W.2d 427 (1969)). Asking for expert testimony "call[s] upon [persons] of exceptional experience and qualifications to give their opinion...." Philler v. Waukesha County, 139 Wis. 211, 214, 120 N.W. 829 (1909).
¶ 18. There can be no doubt that the question posed called for an expert opinion. Whether a gush of [84]*84blood in a person -with a history of term pregnancy is normal or abnormal can only be answered in any meaningful and relevant way by a trained physician. What is normal? What is abnormal? Certainly a lay person, medically untrained and uneducated, is in no position to answer such a question with anything other than a speculative guess.
¶ 19. The question called for Dr. Acosta's opinion, an opinion which could only be based upon his specialized knowledge, knowledge not within the range of ordinary training and intelligence. Accordingly, it was a question asking for an expert opinion.
II.
¶ 20. Having determined that the question at issue asked for Dr. Acosta's expert, opinion, we now turn to the second issue presented by this case: whether Dr. Acosta has a legal privilege to refuse to provide his expert opinion. We conclude that under the circumstances presented the answer is yes.
¶ 21. Whether a witness has a legal privilege to refuse to provide expert testimony is a question of law which this court reviews de novo. See Vultaggio v. Yasko, 215 Wis. 2d 326, 329, 572 N.W.2d 450 (1998).
¶ 22. As a general rule, no person has a privilege to refuse to give evidence. Wisconsin Stat. § 905.01 provides:
905.01 Privileges recognized only as provided. Except as provided by or inherent or implicit in statute or in rules adopted by the supreme court or required by the constitution of the United States or Wisconsin, no person has a privilege to:
(1) Refuse to be a witness; or
(2) Refuse to disclose any matter; or
[85]*85(3) Refuse to produce any object or writing; or
(4) Prevent another from being a witness or disclosing any matter or producing any object or writing.
¶ 23. Privileges are the exception, not the rule. "[P]arties in litigation are entitled to every person's evidence, except when a person from whom evidence is sought has a privilege not to give evidence that is inherent or implicit in statute or in rules adopted by the supreme court or required by the constitution of the United States or Wisconsin.'" Borgwardt, 196 Wis. 2d at 350-51 (quoting Wis. Stat. § 905.01). See also Wis. Stat. § 804.01(2)(a) (reprinted in part below).3
¶ 24. Having a right to refuse to provide certain testimony is a privilege. To determine whether an expert has a legal privilege to refuse to provide an expert opinion we must determine whether a statute, supreme court rule or the federal or state constitutions expressly or implicitly provides for a testimonial privilege for experts. Although we find no express provision in the statutes, supreme court rules or constitutions granting a privilege in all cases for expert testimony, there is an express statement in the statutes regarding court-appointed experts.
¶ 25. Wisconsin Stat. § 907.06 regarding court-appointed experts provides in pertinent part: "(1) [86]*86Appointment. . . .The judge may appoint any expert witnesses agreed upon by the parties, and may appoint witnesses of the judge's own selection. An expert witness shall not be appointed by the judge unless the expert witness consents to act." (Emphasis supplied.) This provision was included in § 907.06 as originally enacted. Wisconsin Rules of Evidence, 59 Wis. 2d R1, R215. The language of this rule is clear and unambiguous. Reasonable people could not differ regarding the meaning of this rule. A judge may not appoint an expert unless the expert consents to so act.
¶ 26. We conclude that this express grant implies a privilege to refuse to testify if the expert is called by a litigant. If a court cannot compel an expert witness to testify, it logically follows that a litigant should not be able to so compel an expert. It makes little if any sense to conclude that a litigant has greater rights than a court with respect to obtaining testimony from experts.
¶ 27. We conclude that a witness's privilege to refuse to provide expert testimony is inherent in Wis. Stat. § 907.06. Any other result would be inconsistent and fly in the face of logic.4
¶ 28. Having determined that a witness has a legal privilege to refuse to provide expert testimony, we must determine the extent of such privilege. Dr. Acosta argues that an expert has an absolute privilege not to testify or, in the alternative, a qualified privilege.
[87]*87¶ 29. Cases across the country vary in the approach to compelling experts to testify. Some states have adopted an absolute privilege for experts. Under the absolute privilege the witness is only required to testify regarding his or her observations, just as any other witness. The witness is not compelled to give expert testimony even if the witness had formed opinions prior to the deposition and without additional study, experimentation, thought or reflection. See Ondis v. Pion, 497 A.2d 13 (R.1.1985); People v. Thorpe, 72 N.E.2d 165 (N.Y. 1947); Stanton v. Rushmore, 169 A. 721 (N.J. 1934).
¶ 30. Other courts, including this court nearly 90 years ago, have adopted a narrow qualified privilege for experts. Under the narrow qualified privilege, a witness may not be compelled to give expert testimony if doing so requires any amount of study, experimentation, thought or reflection. Philler, 139 Wis. at 215. See also Reed v. Fetherston, 785 F. Supp. 1352, 1353 (E.D. Wis. 1992). If, however, a witness already has an opinion, formed without the need for further study, experimentation, thought or reflection, that opinion is a fact to which the witness must testify. Philler, 139 Wis. at 215.
¶ 31. Some courts have adopted a broader qualified privilege for experts. Under this broader qualified privilege, an expert may be forced to provide expert testimony but only if the compelling party "affirmatively demonstrate[s] some compelling necessity for an expert's testimony that overcomes the expert's and the public's need for protection. Additionally, an adequate plan of compensation must be presented." Mason v. Robinson, 340 N.W.2d 236, 242 (Iowa 1983). See also, Deitchman v. E.R. Squibb & Sons, Inc., 740 F.2d 556, [88]*88560-61 (7th Cir. 1984). Furthermore an expert only can be compelled to give previously formed opinions and cannot be required to engage in any out-of-court preparation. Mason, 340 N.W.2d at 242-43.
¶ 32. The appropriate scope of expert privilege requires a balance between the right of expert witnesses to be free from testifying against their will and the needs of the court and litigants for testimony. A person who has expended resources to attain specialized knowledge should not be forced to part with that knowledge upon demand, absent compelling circumstances. We do not force lawyers to provide services to anyone who walks in the door. We do not force other professionals to provide their services absent compelling circumstances. We see no reason to treat experts in ■ a court of law any differently.
¶ 33. On the other hand, the general maxim that everyone has a right to every person's evidence, is premised on the need of the judicial system to have access to all information needed to reach the truth. State v. Migliorino, 170 Wis. 2d 576, 587, 489 N.W.2d 678 (Ct. App. 1992) (citing United States v. Nixon, 418 U.S. 683, 710 (1974)). See also Mason, 340 N.W.2d at 242. In some situations, it is conceivable that a particular expert's testimony is uniquely necessary. "Although the duty to testify requires sacrifices from a citizen, the inconvenience to the witness may be overborne by the need of the court and litigant for the testimony." Mason, 340 N.W.2d at 242. See also Deitchman, 740 F.2d at 563. The cornerstone of expert testimony is the need for such testimony to assist the trier of fact. Wis. Stat. § 907.02. An expert's testimony is generally based on applying the expert's specialized knowledge to a [89]*89certain set of facts to then draw conclusions and render an opinion. Mason, 340 N.W.2d at 242.
¶ 34. As appears to be the case here, there can be a number of people within a field with similar specialized knowledge capable of rendering an expert opinion on the question or questions asked. In such instance, the opinion of one particular expert is not irreplaceable. "[UJnlike factual testimony, expert testimony is not unique and a litigant will not be usually deprived of critical evidence if he cannot have the expert of his choice." Id.
¶ 35. We believe that the broad qualified privilege for experts, adopted by the Iowa Supreme Court in Mason, properly strikes the balance between the competing interests of the needs of the court and litigants for testimony and the implied privilege of expert witnesses to be free from testifying against their will. Accordingly, we hold that absent a showing of compelling circumstances, an expert cannot be compelled to give expert testimony whether the inquiry asks for the expert's existing opinions or would require further work.5 In addition to demonstrating a compelling need for the expert's testimony, the party seeking the expert's testimony must present a plan of reasonable compensation. Finally, if the party seeking an expert's opinion is able to show a compelling need for the expert's opinion, an expert can only be compelled to give existing opinions. Under no circumstances can an expert be required to do additional preparation. We [90]*90believe that this approach strikes a balance between a litigant's need for irreplaceable or unique testimony, and the expert's right to be free from compulsion.
¶ 36. In the present case, the Alts did not show a compelling need for Dr. Acosta's testimony with respect to the particular question asked. They argue that he is a unique witness because he provided prenatal care to Dawn Alt and wrote her discharge summary. We disagree. Dr. Acosta may be unique with respect to the prenatal care provided to Dawn Alt and he must testify as to his observations in that role. However, he does not appear to be unique with respect to the question asked. Dr. Acosta's prenatal care of Dawn Alt and authoring her discharge summary make him no more and no less qualified than any other obstetrician to give an expert opinion about whether a gush of blood in a patient who has a history of term pregnancy is abnormal.
¶ 37. The Alts argue that the testimony to which an expert can be compelled to testify was established nearly 90 years ago in Philler. They assert that according to Philler an expert must testify regarding existing opinions although he or she cannot be compelled to engage in further study, experimentation, thought or reflection. Philler, 139 Wis. at 215. We agree that this is the directive oí Philler but contrary to the Alts' assertion, Philler is no longer the law in Wisconsin.
¶ 38. With the adoption of the Wisconsin Rules of Evidence, a privilege which existed at common law is no longer valid unless adopted by the legislature or a supreme court rule, or required by the state or federal constitution. Davison v. St. Paul Fire & Marine Ins. Co., 75 Wis. 2d 190, 202, 248 N.W.2d 433 (1977); Wis. Stat. § 905.01.
[91]*91[I]f there existed a prior common law privilege. . unless such privilege was provided by or was inherent or implicit in statutes, or in the rules of the supreme court, or was required by the United States or Wisconsin constitution at the time the appellant asserted the privilege, this court could not, after the enactment of sec. 905.01, recognize such a privilege.
Id. The common law rule as expressed in Philler that an expert may be compelled to testify to an opinion he or she has already formed, Philler, 139 Wis. at 215, was not provided by, or inherent or implicit in the statutes, supreme court rules, nor required by the state or federal constitution. Therefore, after the enactment of Wis. Stat. § 905.01, the court cannot recognize the common law privilege as expressed in Philler,6 As discussed above, the concepts of Philler were modified and recreated when the legislature enacted Wis. Stat. § 907.06, prohibiting courts from appointing experts without their consent. Unlike Philler which required experts to testify regarding existing opinions, § 907.06 makes no such requirement.
[92]*92HH HH I — I
¶ 39. At this point, we have determined that the question posed to Dr. Acosta about whether a gush of blood was abnormal asked for his expert opinion. We have also determined that absent compelling circumstances Dr. Acosta has a qualified privilege to refuse to answer the question. We now turn to the third issue presented by this case: whether the circuit court erroneously exercised its discretion in imposing sanctions against Burnett for directing Dr. Acosta not to answer the question.
¶ 40. A circuit court has discretion to impose sanctions for discovery abuses. Paytes v. Kost, 167 Wis. 2d 387, 393, 482 N.W.2d 130 (Ct. App. 1992) (citing Johnson v. Allis Chalmers Corp., 162 Wis. 2d 261, 273, 470 N.W.2d 859 (1991)). "A discretionary decision will be sustained if the circuit court has examined the relevant facts, applied a proper standard of law, and, using a demonstrated rational process, reached a conclusion that a reasonable judge could reach." Paytes, 167 Wis. 2d at 393. Because we concluded above, as a matter of law, that absent compelling circumstances a witness has a qualified privilege to refuse to provide expert testimony, we conclude that the circuit court did not apply the proper standard of law. Accordingly, the circuit court erroneously exercised its discretion in imposing sanctions.
¶ 41. In response to Burnett and Dr. Acosta's conduct at the second deposition, plaintiffs' counsel filed a motion to compel discovery pursuant to Wis. Stat. § 804.12(1) and (2) and for sanctions pursuant to § 804.12(2). Section 804.12(2) provides in pertinent part:
[93]*93(2) Failure to comply with order, (a) If a party or an officer, director, or managing agent of a party or a person designated under s. 804.05(2)(e) or 804.06(1) to testify on behalf of a party fails to obey an order to provide or permit discovery, including an order made under sub. (1) or s. 804.10, the court in which the action is pending may make such orders in regard to the failure as are just, and among others the following:
(b) In lieu of any of the foregoing orders or in addition thereto, the court shall require the party failing to obey the order or the attorney advising the party or both to pay the reasonable expenses, including attorney fees, caused by the failure, unless the court finds that the failure was substantially justified or that other circumstances make an award of expenses unjust.
In other words, if the deponent fails to comply with an order to provide or permit discovery, e.g., fails to answer a deposition question, the court may impose various sanctions including the imposition of reasonable expenses.
¶ 42. It is not clear in the record whether the circuit court imposed sanctions on Burnett only under Wis. Stat. § 804.12(2) as a sanction for failing to comply with the court's prior order to compel discovery or if it also imposed expenses under Wis. Stat. § 804.12(1) (reprinted below)7 as a sanction for granting plaintiffs' [94]*94second motion to compel discovery. However, regardless of the basis for the court's imposition of sanctions, our determination is the same because both §§ 804.12(1) and (2) allow the court to deny a motion to impose sanctions if the non-compliant party was substantially justified.
¶ 43. Parties can obtain discovery regarding any relevant matter that is not privileged. Wis. Stat. § 804.01(2)(a). Although the circuit court should not rely on the judgment of the attorneys involved for their self-interested determination that a privilege exists, Franzen v. Children's Hospital, 169 Wis. 2d 366, 386-87, 485 N.W.2d 603 (Ct. App. 1992), a substantiated assertion of privilege is substantial justification for failing to comply with an order to provide or permit discovery.
¶ 44. At Dr. Acosta's second deposition, the Alts' attorney asked Dr. Acosta whether a gush of blood was abnormal for a patient with a history of term pregnancy. Contrary to the dissent's assertion that there was no substantiated assertion of an expert witness privilege, dissent at 112, the record shows that Dr. Acosta's attorney, Burnett, specifically objected on the . grounds that the question asked for an expert opinion: "Let me object to the form of the question. Again, that asks the doctor for expert opinion and I'm going to direct him not to answer that question." Attorney Burnett explained that he was unwilling to allow Dr. Acosta to give "wide-open expert testimony" regarding [95]*95the care and treatment provided by the physician and others present at the child's birth. For this, the circuit court imposed sanctions.
¶ 45. Were we to uphold sanctions in this case, we would be forcing Burnett and Dr. Acosta to make a choice between protecting a privilege and avoiding sanctions. Had Dr. Acosta answered the question regarding whether a gush of blood was abnormal, his privilege to refuse to provide expert testimony would have been violated. Although sanctions would then have been avoided, and even though a reviewing court might later strike the answer, this might be little consolation to the expert who for whatever reason was forced to testify against his or her will. We cannot put attorneys and deponents in this untenable situation.
¶ 46. We caution attorneys that our holding in this case is not a license to assert unsubstantiated privileges. An unsubstantiated and unfounded privilege is not substantial justification for not imposing sanctions under Wis. Stat. § 804.12(2). See B & B Investments v. Mirro Corp., 147 Wis. 2d 675, 687-88, 434 N.W.2d 104 (Ct. App. 1988).
¶ 47. In sum, because we have concluded, as a matter of law, that Dr. Acosta was not required to answer the question, we determine that Burnett was substantially justified in objecting to the question and directing Dr. Acosta to not answer it. Accordingly, the circuit court erroneously exercised its discretion in imposing sanctions because it did not apply the proper standard of law. We reverse the court of appeals' decision.
[96]*96IV.
¶ 48. We now reach the fourth issue presented by this case: whether granting a supervisory writ ordering the circuit court to enter a default judgment against the defendants in this case is appropriate. We conclude that a supervisory writ is not appropriate for two reasons. First, plaintiffs failed to follow the proper procedure by first petitioning the court of appeals for a supervisory writ as required by Wis. Stat. § (Rule) 809.71. Second, plaintiffs have not made a sufficient showing to justify a supervisory writ.
¶ 49. The plain language of Wis. Stat. § (Rule) 809.71 requires that before this court can grant a supervisory writ, the moving party must first "file a petition for a supervisory writ in the court of appeals under s. 809.51 unless it is impractical to seek the writ in the court of appeals." § (Rule) 809.71. See also Judicial Council Notes — 1981, Wis. Stat. § (Rule) 809.71 (West Stat. Ann. 1994). There is nothing in the record, the briefs filed with the court of appeals, or the court of appeals' decision, Alt, 215 Wis. 2d 203, that indicates plaintiffs ever petitioned the court of appeals for a supervisory writ. The plaintiffs also have not demonstrated that it was impractical to first seek a supervisory writ in the court of appeals.
¶ 50. Even if the plaintiffs had followed the proper procedure, the plaintiffs have not made a sufficient showing to justify a supervisory writ ordering the circuit court to enter a default judgment against defendants.
A petition for a supervisory writ will not be granted unless: (1) an appeal is an inadequate remedy; (2) grave hardship or irreparable harm will result; (3) [97]*97the duty of the trial court is plain and it must have acted or intends to act in violation of that duty, and (4) the request for relief is made promptly and speedily.
State ex rel. Oman v. Hunkins, 120 Wis. 2d 86, 91, 352 N.W.2d 220 (Ct. App. 1984) (citing State ex rel. Beaudry v. Panosian, 35 Wis. 2d 418, 426, 151 N.W.2d 48 (1967)).
¶ 51. Regarding the first criterion for a supervisory writ, that an appeal is an inadequate remedy, the plaintiffs argue that the circuit court and court of appeals have recognized the discovery abuses occurring in this case. They assert, however, that neither court has imposed adequate sanctions. We disagree. As discussed above, imposing sanctions is a decision within the circuit court's discretion. Paytes, 167 Wis. 2d at 393. A discretionary decision will not be overturned by an appellate court if the circuit court examined the relevant facts, applied the proper standard of law and, using a rational process demonstrated in the record, reaches a conclusion that a reasonable judge could reach. Id. Imposing monetary sanctions is one of many sanctions available to the circuit court to enforce discovery orders. Wis. Stat. § 804.12(2). Because it is within the circuit court's discretion to determine which of the available sanctions appropriately addresses the non-compliance, we cannot determine that an appeal is an inadequate remedy.
¶ 52. Regarding the second criterion in Oman that grave or irreparable harm will result, plaintiffs argue that Dr. Acosta's testimony is irreparably tainted by the discovery abuses of his attorney and the defendants' attorneys. We disagree. We do not understand plaintiffs' insistence on obtaining the expert testimony of Dr. Acosta. We recognize that he was [98]*98Dawn Alt's treating physician and wrote her discharge summary. However, Dr. Acosta has not disputed that he must testify to his observations as a witness. Regarding his expert testimony, the record shows that plaintiffs have named many other medical experts. Although the record is not clear about the exact nature of the testimony of each of these named expert witnesses, there are undoubtedly other experts in the world who could testify regarding obstetrical procedures. While plaintiffs may not attain the testimony they hoped for from Dr. Acosta, there are countless other experts on whom they could call.
¶ 53. Turning to the third criterion listed in Oman, plaintiffs have not shown that the circuit court acted or intends to act in violation of a plain duty. Dismissal as a sanction for discovery abuses, as the plaintiffs request, is proper only when the moving party shows that the non-compliant party acted in bad faith or engaged in egregious conduct. Johnson, 162 Wis. 2d at 275 (citations omitted). There is no doubt that the attorneys in this case have unfortunately developed a contentious relationship. However, we find nothing in the record that indicates Burnett's actions rose to the level of egregious conduct. Furthermore, Burnett was correct in asserting that the question posed by plaintiff s counsel during deposition asked for Dr. Acosta's expert opinion.
¶ 54. There is also nothing in the record to indicate that the action of the attorneys for the defendants in this case rose to the level of egregious conduct or actions made in bad faith. Rather the attorney for defendants, Dr. Cline and the Women's Health Specialists, ceased all communications with Dr. Acosta in compliance with the circuit court order following Dr. [99]*99Acosta's first deposition. Accordingly, the circuit court did not have a plain duty to impose sanctions beyond what it, in its discretion, determined was appropriate in this case, monetary sanctions.
¶ 55. Finally, the fourth Oman criterion for a supervisory writ is if the request for relief is made promptly and speedily. Plaintiffs made a request for sanctions pursuant to Wis. Stat. § 804.12(2), along with their motion to compel discovery. Although dismissal of the action is an available sanction under § 804.12(2)(a)3, plaintiffs never specifically requested dismissal as a sanction. While plaintiffs made the request for sanctions promptly and speedily, this factor standing alone is not enough to convince us that a supervisory writ is warranted.
¶ 56. In sum, the plaintiffs have not made a sufficient showing that a supervisory writ entering default judgment against the defendants is appropriate. We accordingly deny plaintiffs' request for a supervisory writ.
By the Court. — The decision of the court of appeals is reversed; the petition for a supervisory writ is denied.