MAINTAINABILITY DESIGN TECHNIQUES METRIC - AcqNotes.com

Downloaded from http://www.everyspec.com on 2011-10-29T14:56:01.DOD-HDBK-791(AM)3-7 STANDARDIZATION AND INTER- the design of an item. If an answer is "no" for any questionCHANGEABILITY CHECKLISTS on the checklists, the design should be restudied to determinewhether correction is required.Tables 3-1 and 3-2 checklists for standardization andinterchangeability, respectively—are for use in evaluating1.2.3.4.5.6.7.8.9.TABLE 3-1. STANDARDIZATION CHECKLISTHave all sources of standardization information been searched for common items, materials, and practices?Has each requirement for a tool or item of ground support equipment (GSE) been analyzed to determine whether theneed can be eliminated or the tool made common with those already used?Do designs and practices make use of the SI of measures where required?Have special manufacturing techniques been avoided or minimized?Are materials, processes. and components covered by Military Specifications’! Is a QPL available?Can standard circuits be used that will also be compatible with standardized test equipment?Are circuit types kept to a minimum?Are identical parts used wherever possible in similar equipment or in a series of a given type, such as using the samepiston and cylinder for a series of internal combustion engines?Are parts, fasteners, connectors, lines, cables, etc., standardized throughout the system, particularly from unit to unitwithin the system?1.2.3.4.5.6.7.8.9.10.11.TABLE 3-2. INTERCHANGEABILITY CHECKLISTDoes functional interchangeability exist where physical interchangeability is possible?Does complete interchangeability exist wherever practical?Is sufficient information provided on identification plates and within technical manuals to enable the user to decidewhether two similar parts are interchangeable?Are differences in size, shape, and mounting of components encouraged to eliminate the suggestion that parts may befunctionally interchangeable?Is complete interchangeability provided for all items intended to be identical, interchangeable, or designed to servethe same function in different applications?Do mounting holes and brackets accommodate units of different makes, such as engines of the same type andhorsepower, built by different manufacturers?Are cable harnesses designed so that they can be fabricated in a factory and installed as a unit?Is complete electrical and mechanical interchangeability provided on all like removable components?Are bolts, screws, and other features the same size for all covers and cases on a given piece of equipment?Is interchangeability provided for components having a high mortality?Where complete interchangeability is not practical, are parts of units designed for functional interchangeability, andare adapters provided to allow physical interchangeability, wherever practical?3-12