1 EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated November 1, 2000 relating to the consolidated financial statements and financial statement schedule, which appears in Project Software and Development Inc.'s Annual Report on Form 10-K/A for the year ended September 30, 2000. We also consent to the reference to us under the heading "Experts" in such Registration Statement. PricewaterhouseCoopers LLP Boston, MA March 14, 2001