"Maintainability." . . "Maintenance." . . "TRW SPACE TECHNOLOGY LABS REDONDO BEACH CALIF." . . "Probability." . . "Equations." . . . . "Failure(mechanics)" . . . . "A basic plan for the evaluation of the quality of periodic maintenance on subsystems"@en . . . . . . "A basic step by step plan for evaluating the quality of periodic maintenance of single-unit equipment is presented. All mathematical derivations have been relegated to reference documents in the interests of simplicity and only the required data and formulae are given. (Author)."@en . . . . "Mathematical analysis." . .