The Commonwealth brings this appeal claiming that the trial court, in ordering the prosecution of a private criminal complaint, usurped its policy-making authority contrary to the separation of powers doctrine. We are also asked to clarify the standard by which the trial court evaluates a prosecutor’s decision regarding a private complaint. Further, we must establish the standard for appellate review of such a complaint. Because we find that the trial court did not err or abuse its discretion in directing the Attorney General to prosecute this case, we affirm.
In September 1989, while investigating the kidnapping, rape and murder of Kathy Wilson, the police in Warren County, Pennsylvania, offered a reward for information leading to the discovery and conviction of her killer. In response, New York resident Michael Reuben Brown, then age 16, contacted authorities and claimed to have information about the case. Police arranged to have Brown transported to Pennsylvania. Upon his arrival, Brown was immediately arrested and charged with Wilson’s murder, rape and kidnapping.' Following his arrest, Brown gave statements to police that implicated Jay William Buckley as Wilson’s murderer. Thereafter, police arrested Buckley and charged him with Wilson’s murder, kidnapping, and rape. In return for his testimony against Buckley, prosecutors agreed to permit Brown to plead guilty to the lesser charges of indecent assault, felonious restraint, and hindering apprehension.
At Buckley’s trial, Brown testified that he had been with Buckley and had witnessed him kidnap, rape, and ultimately kill Wilson. However, during ten. days of cross-examination, defense counsel questioned Brown about numerous inconsistencies between his in-court testimony and the statements he had given to police. Counsel pointed out discrepancies in, among other things, Brown’s descriptions of Wilson’s clothing, how she was abducted, and the type of weapon used. As a result, Brown admitted that he had repeatedly lied in his statements to police and during previous court appearances. Brown also conceded that he had committed numerous acts of *459perjury at Buckley’s preliminary hearing. In all, Brown admitted to having told over 700 lies in connection with the disappearance and murder of Wilson. Subsequently, the jury acquitted Buckley on all charges.
Following Brown’s guilty plea to the lesser charges, the trial court sentenced him to an aggregate term of 7 to 14 years’ imprisonment. Brown then filed post-trial motions for reconsideration of his sentence and withdrawal of his guilty plea. Thereafter, at a hearing on these motions, Brown again testified that he had lied at Buckley’s trial when he claimed to have been an eyewitness to Wilson’s abduction, rape and murder. According to Brown, his trial testimony had been scripted by Pennsylvania State Trooper John Herzog and District Attorney Joseph Massa, and he had testified the way that he did at their request. The trial court granted Brown’s petition to withdraw his guilty plea and authorized the Commonwealth to reinstate the original charges against him. The Commonwealth, however, elected not to prosecute and petitioned the court to nolle pros all charges. The trial court granted this petition. Further, the District Attorney decided not to file charges against Brown for making false statements to police or committing perjury during Buckley’s preliminary hearing and trial.
On November 21, 1991, Buckley submitted a private criminal complaint to the Warren County District Attorney’s Office pursuant to Pa.R.Crim.P. 133, Approval of Private Criminal Complaints, which has since been re-numbered as Pa. R.Crim.P. 106. In his complaint, Buckley alleged that Brown committed three acts of perjury and one act each of making false reports to law enforcement authorities, tampering with or fabricating physical evidence, hindering apprehension or prosecution, obstructing the administration of law or other governmental function, making unsworn falsifications to authorities, and criminal conspiracy. The private criminal complaint was based upon Brown’s actions leading up to Buckley’s arrest and during Buckley’s trial.
In his complaint, Buckley named the District Attorney as Brown’s co-conspirator. As a result, the District Attorney, *460pursuant to the Commonwealth Attorney’s Act, 71 P.S. § 732-205(a)(3), asserted a conflict of interest and requested that the Attorney General review the complaint. In July 1993, twenty months after its submission to the District Attorney’s Office, the Attorney General disapproved Buckley’s private criminal complaint. Pursuant to Rule 106, Buckley filed a petition with the court of common pleas, seeking its. approval of the private criminal complaint. Following a hearing in December 1993, the trial court concluded that the Attorney General had committed a gross abuse of discretion in disapproving the first eight counts of Buckley’s private criminal complaint and directed the Attorney General to prosecute Brown on those charges. However, the court disapproved the conspiracy charge, determining that the Attorney General had acted within his discretion when deciding not to prosecute on that charge. This appeal followed.
On appeal, the Attorney General argues that the trial court’s directive to prosecute the criminal complaint, despite the Attorney General’s policy-based discretionary decision to the contrary, violates the separation of powers doctrine. The Attorney General further asserts that the trial court erred in determining that he committed a gross abuse of discretion in disapproving the private criminal complaint.
In order to consider the merit of these contentions, we must analyze the authority that establishes the proper procedure for addressing private criminal complaints. This procedure is set forth in Pa.R.Crim.P. 106 as follows:
Rule 106. Approval of Private Complaints
(a) When the affiant is not a law enforcement officer and the offense(s) charged include(s) a misdemeanor or felony which does not involve a clear and present danger to any person or to the community, the complaint shall be submitted to an attorney for the Commonwealth, who shall approve or disapprove it without unreasonable delay.
(b) If the attorney for the Commonwealth:
*461(2) disapproves the complaint, the attorney shall state the reasons on the complaint form and return it to the affiant. Thereafter the affiant may file the complaint -with a judge of a court of common pleas for approval or disapproval....
As his first issue, the Attorney General contends that the trial court’s directive to prosecute Buckley’s private criminal complaint, despite the Attorney General’s policy-based discretionary decision to the contrary, violates the separation of powers doctrine. Specifically, he asserts that courts may never evaluate prosecutorial decisions that are based on policy determinations. We disagree.
First, after reviewing the record, we find that this issue is raised for the first time in the Attorney General’s brief to this Court. It is well-settled that if an issue is not properly preserved at trial, it is waived for the purposes of appellate review. Pa.R.A.P. 302(a); Commonwealth v. Shoup, 423 Pa.Super. 12, 620 A.2d 15 (1993). Thus, we find that this issue has been waived.
Moreover, even if this issue had been properly preserved, we conclude that the Attorney General’s contention is without merit. Rule 106, in authorizing the issuance of private criminal complaints, expressly provides for the approval or disapproval of such a complaint by a judge of the court of common pleas. See also Commonwealth v. Stivala, 435 Pa.Super. 176, 187, 645 A.2d 257, 262 (1994) (“The clear language of [Rule 106] indicates that although the prosecuting attorney has discretion over whether to prosecute based upon the filing of a private complaint, that discretion is not unfettered, and necessarily involves review by the trial court.”). In addition, this Court has stated that a judge’s independent review of a private complaint serves as a necessary check and balance of the prosecutor’s decision and protects against the possibility of error. Commonwealth v. Pritchard, 408 Pa.Super. 221, 233, 596 A.2d 827, 833 (1991).
We agree with the Attorney General’s assertion that the separation of powers doctrine, in general, prohibits the judiciary from intervening when the executive branch has *462freely exercised its discretionary authority to execute the laws of the Commonwealth. Cf. Sweeney v. Tucker, 473 Pa. 493, 375 A.2d 698 (1977). It is this doctrine that makes courts wary of interfering with or supervising a prosecuting attorney in the exercise of his discretion in controlling criminal prosecutions. In re Maloney, 431 Pa.Super. 321, 326, 636 A.2d 671, 676 (1994); Commonwealth v. Muroski, 352 Pa.Super. 15, 20, 506 A.2d 1312, 1314 (1986).
However, the separation of powers doctrine does not entirely preclude judicial review of discretionary decisions made by the executive branch. Our supreme court has stated that
“the mere possession of discretionary power by an administrative body does not make it wholly immune from judicial review, but the scope of that review is limited to the determination of whether there has been a manifest and flagrant abuse of discretion or a purely arbitrary execution of the agency’s duties or functions. That the court might have a different opinion or judgment in regard to the action of the agency is not a sufficient ground for interference; judicial discretion may not be substituted for administrative discretion.”
In re Petition of Acchione 425 Pa. 23, 30, 227 A.2d 816, 820 (1967), quoting Blumenschein v. Pittsburgh Hous. Auth., 379 Pa. 566, 572-73, 109 A.2d 331, 335 (1954), appeal dismissed, 350 U.S. 806, 76 S.Ct. 68, 100 L.Ed. 724 (1955). Furthermore, this standard has been applied to discretionary decisions made by a prosecutor. See Commonwealth v. Slick, 432 Pa.Super. 563, 565-65, 639 A.2d 482, 483, appeal denied, 538 Pa. 669, 649 A.2d 671 (1994).
Moreover, the Pennsylvania Constitution gives our supreme court the exclusive power to establish rules of procedure for our judicial system. Pa. Const, art. V, § 10(c); In re 42 Pa.C.S. § 1703, 482 Pa. 522, 394 A.2d 444 (1978). The interpretation of those rules, however, is beyond the jurisdiction of the Superior Court and any attempt to do so would be an unwarranted intrusion into the supreme court’s authority. *463Cf. Reilly by Reilly v. Southeastern Pa. Transp. Auth., 507 Pa. 204, 489 A.2d 1291 (1985). The function of this Court is limited to maintaining and effectuating the law as established by our supreme court. Commonwealth v. Dugger, 506 Pa. 537, 486 A.2d 382 (1985). Thus, we are not empowered to declare that a rule established by the supreme court violates the separation of powers doctrine.
Based upon the foregoing, we conclude that the separation of powers doctrine is not violated by a limited judicial review of a prosecutor’s decision, whether based upon policy considerations or otherwise, regarding a private criminal complaint.
Next, the Attorney General asserts that the common pleas court erred in concluding that he committed a gross abuse of discretion in disapproving Buckley’s private criminal complaint. In order to resolve this issue, we must determine the proper standard for a trial court to apply when it is asked to review a prosecutor’s disapproval of a private criminal complaint. Further, because of existing confusion concerning the proper standard for an appellate court to apply when reviewing a trial court’s determination in such a case, we must clarify that standard as well.
This Court first attempted to establish a standard for reviewing a prosecutor’s determination regarding the approval of a private criminal complaint in Commonwealth v. Eisemann, 276 Pa.Super. 543, 419 A.2d 591 (1980). In Eisemann, this Court stated that “ ‘[t]he judge’s independent review of the complaint checks and balances the [prosecutorj’s decision and further hedges against possibility of error....’” Id. at 546, 419 A.2d at 592, quoting In re Petition of Piscanio, 235 Pa.Super. 490, 495, 344 A.2d 658, 661 (1975). Further, we emphasized the need for courts to give deference to the prosecutor’s discretion because his decision regarding a private criminal complaint “may well depend on matters of policy wholly separate and apart from the existence or nonexistence of probable cause.” Id. Thus, while a court must give proper deference to the prosecutor as a member of the executive branch, it must also, in the interests of justice, ensure that the prosecutor does not make his determinations regarding a *464private criminal complaint without support for his conclusions. After balancing these competing policy interests, we concluded that “a court should not interfere with the exercise of prosecutorial discretion under Rule [106] unless there has been a gross abuse of discretion.” Id. at 546, 419 A.2d at 593. However, the Eisemann court failed to establish which court would review the prosecutor’s decision using the gross abuse of discretion standard.
The Eisemann standard of review was cited with approval in In re Wood, 333 Pa.Super. 597, 482 A.2d 1033 (1984). However, this Court, again, failed to clarify which court should apply the gross abuse of discretion standard. Subsequently, our Court reviewed this standard in Commonwealth v. Muroski, 352 Pa.Super. 15, 506 A.2d 1312 (1986) (en banc), and, for the first time, concluded that an appellate court does not directly review the actions of the prosecutor. Rather, this Court established that an appellate court’s function in reviewing an appeal from the trial court’s decision regarding a prosecutor’s approval or disapproval of a private criminal complaint is to “determine whether the trial court abused its discretion or committed an error of law....” Id. at 19, 506 A.2d at 1314. In addition, we note that Judge Spaeth, in his concurring and dissenting opinion, attempted to clarify the trial court’s function in such an action by stating that “[t]he issue before the trial court was whether in refusing to approve the complaint the district attorney had grossly abused his discretion.” Id. at 31, 506 A.2d at 1321.
In 1989, our supreme court first distinguished between a prosecutorial decision that is based upon a policy determination and one that is based upon a legal evaluation of the sufficiency of the complaint. In Commonwealth v. Benz, 523 Pa. 203, 565 A.2d 764 (1989) (plurality), a private complaint was disapproved for insufficient evidence. The common pleas court applied the Eisemann standard and held that the prosecutor did not abuse his discretion in disapproving the complaint. This Court reversed, finding that the evidence established a prima facie case and, accordingly, directed the district attorney to prosecute. Commonwealth v. Benz, 373 *465Pa.Super. 629, 536 A.2d 321 (1987). The supreme court affirmed this decision, concluding that the prosecutor’s decision not to proceed with the private criminal complaint required an independent review of his legal judgment. Benz, supra, 523 Pa. at 209-10, 565 A.2d at 767. The supreme court further concluded that, because the prosecutorial decision was based upon a legal evaluation of the merits of the case, this review was not an intrusion into prosecutorial discretion. Id. In a footnote, the court distinguished between a prosecutorial decision based upon a policy determination and one based upon a legal evaluation of the merits of the case. The court stated that “[i]f the district attorney had stated policy reasons to support the decision not to prosecute, this Court would show the deference accorded to such a discretionary use of the executive powers conferred in that officer.” Id. at 208 n. 4, 565 A.2d at 767 n. 4.
This distinction between a policy based determination and a legal evaluation of the sufficiency of the complaint was adopted by this Court in Commonwealth v. Jury, 431 Pa.Super. 129, 636 A.2d 164 (1993), appeal denied, 537 Pa. 647, 644 A.2d 733 (1994). In Jury, we determined that this Court reviews a prosecutor’s decision regarding the disapproval of a private criminal complaint by applying the following standard:
When the district attorney rests the disapproval of a private criminal complaint on wholly discretionary matters of policy, this Court will not disturb that determination, absent a gross abuse of discretion. When the district attorney bases a dismissal solely on a lack of evidence, however, this Court will apply a de novo standard of review because such a decision is not entitled to the same deference afforded a policy decision not to prosecute, even where a prima Jade case exists.
Id. at 137, 636 A.2d at 168 (citations omitted). Furthermore, Jury cites the footnote in Benz in support of its conclusion that the Superior Court will perform a de novo review of the legal evaluation by the prosecutor. This standard has been followed in In re Maloney, 431 Pa.Super. 321, 636 A.2d 671 *466(1994), and Commonwealth v. Metzker, 442 Pa.Super. 94, 658 A.2d 800 (1995).
Although we continue to find validity in a court giving deference to a prosecutor’s policy decision not to prosecute a private criminal complaint, we recognize the need to distinguish between the standard of review to be used by the trial court and the appellate court. Jury incorrectly establishes that an appellate court directly reviews the prosecutor’s decision regarding a private criminal complaint. However, Rule 106 reserves this function to the court of common pleas. Thus, we must reject Jury's standard and establish-the folio-wing as the appropriate standard of review.
When a trial court is asked to review a prosecutor’s disapproval of a private criminal complaint, the trial court must first determine the rationale behind the prosecutor’s decision. If the prosecutor’s decision was based upon a legal evaluation of the sufficiency of the complaint, then the trial court must undertake a de novo review of the complaint to ascertain whether it establishes a prima facie cause of action. If, however, the prosecutor’s decision was based upon a policy determination that it would not be in the best interests of the Commonwealth to prosecute, then the trial court must defer to the prosecutor’s discretion absent a gross abuse of that discretion.
In determining whether a gross abuse of discretion has occurred, the common pleas court must consider whether the policy advanced by the prosecuting authority comports with both the law and justice. A policy must embrace the general principles by which the prosecutor is guided in the management of its public responsibilities. A policy connotes a definite course or method of action selected in light of given conditions to guide and determine both present and future decisions. Therefore, it is expected that a prosecutor should be prepared to advance evidence that confirms the establishment of the policy, as well as corroborates its application to matters of similar,, or like, import.
*467This in no way suggests that the common pleas court may substitute its judgment for that of the prosecutor. But where the prosecutor seeks to rest the decision not to prosecute on policy grounds, the prosecutor must be prepared to come forward with a clear statement as to the particular policy that dictates withholding prosecution as well as how that policy relates to the particular facts being advanced by the private prosecutor.
When an appeal is brought from a common pleas court’s decision regarding the approval or disapproval of a private criminal complaint, an appellate court is limited to ascertaining the propriety of the trial court’s actions. Thus, our review is limited to determining whether the trial court abused its discretion or committed an error of law.
We now apply these standards to the facts of this case. In disapproving the private criminal complaint, the Attorney General provided several reasons for his decision not to pursue criminal charges against Brown; namely: (1) there was no proof of a criminal conspiracy; (2) Brown’s conflicting accounts were “patently obvious to everyone” and actually benefitted Buckley by securing his acquittal; (3) the trial would consume too much additional time and money; (4) Brown had already been incarcerated for two years as a result of his guilty pleas. Attachment to Response to Commonwealth’s Disapproval of Private Criminal Complaint, filed November 17, 1993. The Attorney General’s decision regarding the eight charges in the complaint that are the subject of this appeal was based upon a policy determination that it would not be in the best interests of the Commonwealth to initiate prosecution. Thus, the trial court was limited to determining whether the prosecutor committed a gross abuse of discretion.
The Attorney General contends that the trial court erred when it determined that he had committed a gross abuse of discretion in disapproving the private criminal complaint. The trial court, in reviewing the Attorney General’s decision, determined that there was no acceptable policy advanced by the Commonwealth for its decision not to prosecute Brown on the *468perjury and related charges. Trial Court Opinion, filed January 11,1994 at 8. The trial court concluded that the Commonwealth could not have a policy that ignores Brown’s criminal activities. Thus, it concluded that the Attorney General committed a gross abuse of discretion when disapproving the private criminal complaint. Our review of the record convinces us that the trial court has used the correct standard to evaluate the Attorney General’s decision. Thus, our review is limited to determining whether the trial court committed an abuse of discretion or error of law.
In support of the claim that policy considerations existed that required him to disapprove the private criminal complaint, the Attorney General asserts that Brown’s falsehoods were obvious to everyone and benefitted Buckley by guaranteeing his acquittal. The trial court rejected this argument as frivolous. Id. at 8-9. We agree. The Attorney General cites no authority, nor has our research disclosed any, in support of his claim that obvious falsehoods will not be prosecuted. Rather, it appears that Brown’s perjury undermined the investigation into Wilson’s murder and, thus, more strongly supports the conclusion that he should be punished for his wrongdoing. Accordingly, we agree with the trial court’s conclusion that this assertion cannot serve as the basis for a policy that requires the disapproval of this private complaint. Therefore, we conclude that the trial court did not err or abuse its discretion in making this determination.
The Attorney General also claims that policy compels the disapproval of the private criminal complaint because prosecuting Brown on the perjury charges would be too costly in terms of time and resources. . The trial court noted that the Commonwealth regularly expends large amounts of money pursuing minor offenses. Id. In addition, the trial court concluded, and we agree, that the costs of prosecuting this complaint would not be excessive due to the overwhelming evidence of Brown’s perjury. Id. While this particular policy has merit, the Attorney General did not advance any evidence that would bring this private criminal complaint within the *469parameters of that policy. Accordingly, the trial court did not abuse its discretion or commit an error of law.
Next, the Attorney General asserts that prosecution of the private criminal complaint is not warranted because Brown spent over two years in prison in connection with Wilson’s murder. The trial court, in dismissing this argument, correctly noted that one who commits a crime while in prison will be charged and brought to trial for those crimes. Id. The trial court further concluded that it is not the policy of the Commonwealth to ignore criminal activity. Thus, Brown’s incarceration on an unrelated charge is irrelevant to the decision of whether to prosecute him for other crimes. Accordingly, we agree with the trial court that the Attorney General’s assertion does not support a policy that requires the disapproval of this private criminal complaint. Thus, we can find no abuse of discretion or error of law.
In his brief to this Court, the Attorney General argues that the trial court simply substituted its opinion for that of the prosecutor and labelled the prosecutor’s decision a gross abuse of discretion. Initially, we note that a court does not have the authority to substitute its judgment for that of the prosecutor in evaluating the viability of a private criminal complaint. Cf. In re Petition of Acchione, supra. However, in the present case, we conclude that the Attorney General has failed to produce any evidence of a clearly defined policy that is consistently used to review the merits of a private criminal complaint. A prosecutor, in reviewing a private criminal complaint, cannot simply assert that it is against its policy to prosecute. Instead, the prosecutor must demonstrate that a clearly defined policy has been established that can be uniformly applied to such complaints. If the Attorney General had submitted evidence of an established policy, the trial court would have been able to determine whether, in this case, the Attorney General had actually followed that policy.
Here, the trial court concluded, and we agree, that Buckley established a prima facie case that supports charging Brown with the crimes enunciated in charges 1 through 8 of the *470private criminal complaint. Although the Attorney General claims that its decision not to prosecute was a policy decision, this vague claim of “policy” is unsupported by reference to a specific policy that requires the disapproval of this private criminal complaint. Accordingly, we conclude that the trial court did not abuse its narrowly limited discretion when it found that the Attorney General failed to advance sufficient policy reasons in support of the disapproval of the private criminal complaint.
Based upon the foregoing, it is our determination that the trial court did not abuse its discretion or commit an error of law when it approved Buckley’s private criminal complaint. Thus, we affirm the order that directed the Commonwealth to pursue the complaint regarding the first eight charges against Brown.
Order AFFIRMED.
KELLY, J., files a concurring opinion. BECK and FORD ELLIOTT, JJ., joined the opinion by Johnson, J., and the concurring opinion by Kelly, J. SAYLOR, J., files a dissenting opinion which is joined by CAVANAUGH, J.