PgMP Practice Question

The program manager of a multi-country software-upgrade program discovers that the organization's three certified database architects are concurrently assigned to eight critical-path activities across separate projects. Recent time-sheet data show the architects averaging 70-hour weeks, and post-implementation defects are increasing. At the steering-committee review, the sponsor insists that the global release on 31 March must not slip because contractual penalties would trigger with key partners. Overtime budgets are frozen, and union rules restrict hiring external architects during the current quarter. Schedule analysis reveals negative float on several work packages caused entirely by resource over-allocations. The program manager needs to relieve the overload, protect quality, and keep the committed finish date without adding cost. Which schedule-management technique should the program manager apply first to address the resource conflict?