For an application for dismissal for want of prosecution under Rule 236(3)(b) to succeed, the applicant must prove: (1) that the respondent failed to take necessary steps to bring the claim to finality, and (2) that there is no honest, satisfactory and reasonable explanation for the delay. In exercising its judicial discretion, the court must consider three factors: (a) the length of the delay and the explanation thereof; (b) the prospects of success on the merits; and (c) the balance of convenience and the possible prejudice to the applicant. Delay and lack of reasonable explanation alone cannot form the basis for dismissal without consideration of all three factors. An applicant's case stands or falls on the founding affidavit, and evidence on material issues cannot be introduced for the first time through heads of argument.