1 Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the incorporation by reference in the registration statements of Project Software & Development, Inc. on Form S-8 (File Nos. 33-79074, 33-79142, 33-95774, 33-95780, and 333-3402) of our report dated November 4, 1998, on our audits of the consolidated financial statements and financial statement schedule of Project Software & Development, Inc. as of September 30, 1998, 1997 and 1996 and for the years ended September 30, 1998 and 1997, which report is included in this Annual Report on Form 10-K. PricewaterhouseCoopers LLP Boston, Massachusetts December 22, 1998