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NAVSO
P-3641: Navy Power Supply Reliability Design & Mfg
Guidelines

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Appendix A. Sample
Design Review Checklists
A.2 Mechanical
Checklist
General

(1) Was an adequate safety factor
or design margin considered in all mechanical
design? CDR

(2) Is there adherence to standards for bend
radii, crimping, soldering, welding, brazing,
etc., which are consistent with the application?
CDR

(3) Are adequate methods provided for
packaging, mounting and cooling components
subject to performance degradation or
reliability failure under worst-case thermal
environment? CDR

(4) Is redundancy provided in critical
subsystems to ensure mission success? PDR

(5) Is the use of unqualified mechanical
components kept to a minimum? PDR

(6) Are those components with storage life
and/or operational life restrictions kept to a
minimum? PDR

(7) Have protective measures been
incorporated to prevent installation errors?
CDR

(8) Is there complete interface compatibility
(mechanical-to-mechanical,
mechanical-to-electrical, etc.)?
CDR

(9) Had protection from mechanical abuse by
the use of suitable mechanical protection
techniques (packaging, mounting and structural)
been incorporated? CDR

(10) Has an adequate structural analysis
(static and dynamic) been performed on all
equipment which contains or supports systems or
subsystems? CDR

(11) Have throwaway components been utilized
to the greatest extent possible? CDR

(12) Have limited-life items been identified?
CDR

(13) Have assembly and chassis mounting
locations been reviewed for shock and load
distribution? PDR CDR

(14) Has the design been reviewed for
possible simplification? CDR

(15) Have pins been provided to absorb shock
and vibration loads between assemblies and
structures to prevent damage to mating
connectors? CDR

(16) Has the lowest-cost type of fabrication
compatible with equipment specification
requirements been chosen? Are alternate
construction and
[ExtChr-04h:20h]make-from[ExtChr-04h:1Fh]
drawings applicable? CDR

(17) Is the proper orientation of the unit
for placement in its location made obvious by
its design or labeling? CDR

(18) Does the arrangement of components
follow a functional flow to preserve simplicity
and accuracy? PDR CDR

(19) Have clamps, grommets, or other
protective devices been employed to protect
wiring against damage? CDR

(20) Do all screws have locking devices?
CDR

(21) Are all plug-in items secured with
positive holding clamps? CDR

(22) Are wires clamped so that terminals do
not receive the strain of cable movement?
CDR

(23) Have cantilevered brackets been
eliminated? CDR

(24) Have stiffening means or members been
employed to achieve maximum rigidity with
minimum weight? CDR

(25) Do wires have enough slack to permit
relative motion between terminals during shock
and vibration without putting tension on the
wire or wire connections?
CDR