*29OPINION OF THE COURT BY

Richard Kahalewai was indicted on September 23, 1970, for having sexual intercourse with a female under the age of sixteen in violation of HRS § 768-62. At the arraignment proceeding on October 2, 1970, at which Mr. Kahalewai was present, counsel for the defendant informed the trial court that the defendant wished to waive his right to trial by jury.1 On October 7, 1970, Mr. Kahalewai was tried without a jury and convicted. On May 11, 1971, through another counsel appointed for the purpose of appeal, Mr. Kahalewai filed a motion that the judgment of conviction be set aside and for a new trial. The motion was denied and Mr. Kahalewai appeals that decision to this court.

This appeal raises two issues: (1) whether a demand in open court for a jury-waived trial by an accused’s *30counsel in the accused’s presence constitutes a voluntary and knowing waiver of the accused’s constitutional right to a jury trial in accordance with Rule 23 (a) of the Hawaii Rules of Criminal Procedui-e; and (2) whether the appellant was denied effective assistance of counsel.

The first question was answered in the affirmative by the court’s decision in State v. Olivera, 53 Haw. 551, 497 P.2d 1360 (1972).

As to the second issue, we do not believe the appellant was denied effective assistance of counsel.

The constitutional right to the assistance of counsel in a criminal case, Hawaii Const., Article I, Sec. II,2 U.S. Const. 6th Amend., 14th Amend.; see Gideon v. Wainwright, 372 U.S. 335, 342 (1963), is satisfied only when such assistance is “effective.” Powell v. Alabama, 287 U.S. 45, 71 (1932); Reece v. Georgia, 350 U.S. 85, 90 (1955); People v. Ibarra, 60 Cal.2d 460, 464, 386 P.2d 487, 34 Cal. Rptr. 863 (1963). “Effective” counsel does not mean erroi'less counsel but counsel whose assistance is “within the range of competence demanded of attorneys in criminal cases.” McMann v. Richardson, 397 U.S. 759, 771 (1970).

Although determining whether the demands of due process have been met in this case involves measuring counsel’s assistance against “the fundamental ideas of fairness and right,” Betts v. Brady, 316 U.S. 455, 473 (1942) and is always a question of judgment and degree, Brubaker v. Dickson, 310 F.2d 30, 37 (9th Cir. 1962), general standards have evolved which this court will apply to aid it in making this determination. A primary requirement is that counsel must “conduct careful factual and legal investigations and inquiries with a view to developing matters of defense in order that he may make informed decisions on his client’s behalf,” In re Saunders, *312 Cal.3d 1033, 1041, 472 P.2d 921, 926, 88 Cal. Rptr. 633, 638 (1970), both at pretrial proceedings, cf. Von Moltke v. Gillies, 332 U.S. 708, 721 (1948), In re Williams, 1 Cal.3d 168, 174-76, 460 P.2d 984, 988-89, 81 Cal. Rptr. 784, 788-89 (1969), In re Saunders, supra, and at trial, Brubaker v. Dickson, supra, 310 F.2d 30 (9th Cir 1962), People v. Ibarra, 60 Cal.2d 460, 464, 386 P.2d 487, 34 Cal. Rptr. 863 (1963), In re Saunders, supra at 1042.

With the above standards in mind we proceed to consider defendant’s allegations.

The thrust of appellant’s argument is that his trial counsel’s advice to waive jury trial was based on uninformed judgment, because trial counsel advised appellant to opt for a bench trial on the ground that appellant’s conviction for burglary in 1957 would serve as a handicap in a jury trial. This advice was given in ignorance of the rule articulated by this court in Asato v. Furtado, 52 Haw. 284, 293, 474 P.2d 288, 295 (1970) (filed on September 8, 1970, twenty-four days prior to appellant’s arraignment) :

The rule we adopt is that a prior conviction may come in if, but only if, the trial judge, in his discretion, feels that the party offering the evidence has satisfactorily shown that the conviction to be proved rationally carries probative value on the issue of the truth and veracity of the witness.

Although admitting that whether Asato would have barred the case of defendant’s burglary conviction for impeachment was “arguable”, appellant contends that the Asato rule “should make a pretrial motion to suppress a thirteen-year-old conviction mandatory before advising a jury waiver on the grounds the conviction could be used for impeachment.” As trial counsel not only did not make the motion but had not even read Asato, “the conclusion,” appellant argues, “is unavoidable . . . [that trial counsel’s advice] was not within the range of competence demanded of attorneys in criminal cases.”

*32Appellant reached his conclusion, however, without first considering the primary issue in this case. In cases where the adequacy of counsel is in question, we musí first examine the record with appellant’s allegations in mind, to determine whether, viewed as a whole, the assistance provided appears to have been below the level of ordinary competence demanded of lawyers in criminal cases. If this examination shows that defenses crucial to appellant’s case could have been, but were not raised, or that trial counsel inexplicably failed to assert appellant’s constitutional rights, the case will be examined further to determine whether counsel’s actions were the result of informed judgment or constitutionally inadequate preparation. The issue of informed judgment, on which appellant places so much emphasis, is only relevant where the actions or inactions resulting from that judgment seem unreasonable. If this were not so, every criminal conviction would be vulnerable on appeal to the allegation or admission that trial counsel’s choice of defenses or tactics, reasonable on the surface, had actually been made in gross ignorance of important rules of law.3

In the instant case, appellant’s allegation could only succeed if it were established that advising a jury trial waiver, in view of the record as a whole, was unreasonable. This has not been established. Appellant’s prior criminal record was only one of several factors to be considered in reaching the determination to advise a non-jury trial. That a jury may be unfavorably disposed toward a criminal defendant considerably past the age of majority and charged with having sexual intercourse with a female under the age of sixteen, like the appellant in the present case, is frequently a salient consideration. And a maneuver designed to avoid this highly probable adverse reaction, cannot be deemed unreasonable.

For the reasons stated above, the judgment of denial of the appellant’s motion that the judgment of conviction be set aside and for a new trial is affirmed.

DISSENTING OPINION OF

I dissent.

For the reasons stated in my dissenting opinion in State v. Olivera, 53 Haw. 551, 555, 497 P.2d 1360, 1362 (1972) I do not think an open court demand for a non-jury trial made by counsel in the accused’s presence constitutes a voluntary and knowing waiver by the accused of his right to trial by jury.

It is equally clear to me that an accused is denied the right to effective assistance of counsel1 when counsel advises a waiver of the right to trial by jury without first having read a decision of this court bearing directly upon his reason for giving such advice. “[Ujnlike other decisions, which are often called ‘trial decisions,’ where it is counsel who decides whether to cross examine a particular witness or introduce a particular document,” Poe v. United States, 233 F. Supp. 173, 176 (D.C.C. 1964) (Wright, J., sitting by designation), the decision whether to waive the right to trial by jury is personal to the accused. Since it is the accused who must make the ultimate decision, it is counsel’s duty to provide him with all *34relevant information, both factual and legal, on which he can rely in making his decision. People v. Ibarra, 60 Cal. 2d 460, 386 P.2d 487, 34 Cal. Rpter. 863 (1963).

In this case, counsel’s failure to read and thereby take into account a matter of law, particularly one established by the highest court in this state, relating to an important legal fact counsel himself considered highly significant, establishes, in my view, a clear violation of appellant’s right to effective assistance of counsel. Without first . familiarizing himself with the applicable law, counsel could not and did not exercise any judgment with respect to his advice to waive trial by jury.

The cost of keeping abreast of current legal developments in this jurisdiction, where counsel is licensed and practices law, is minimal. Further, it is not unrealistic to expect counsel to subscribe to and read decisions of this court within a reasonable time after they are published. At the least, upon undertaking representation, counsel can be expected to examine the advance sheets, as a matter of course, to determine whether any recent decisions bear upon the matter at hand. As it is stated in the Code of Professional Responsibility adopted by this court, counsel “should strive to become and remain proficient in his practice and should accept employment only in matters which he is or intends to become competent to handle.” Code of Professional Responsibility, EC 6-1 (1970).