This is one of the classic falcalies of management: that swapping out managers can rescue any failing initiative.It’s not true. Fundamentally flawed undertakings cannot be fixed, by definition. The F-35, for example, is backed into a corner on weight. The remaining weight budget is tiny. Yet there are many issues revealed by flight testing, such as structural cracking and tailhook relocation, which will inevitably entail considerable increases in weight. Too much to fit into the remaining allowance. Something’s gotta give. But nothing can.This stuff is physics. No matter how artful the program manager, physical law will not bend to accommodate their wishes.Even the entirely virtual area of flight vehicle software faces limits which do not admit of easy managerial adjustment.LockMart, for example, promise that they will solve the slipping software schedule by hiring more engineers. It’s as though Fred Brooks and _The Mythical Man-Month_ never existed. They’re demonstrating a complete ignorance of Brooks’s dictum that adding headcount to a late software project invariably makes it even more late.