TRAMM Volume 3 Section 1
ANNEX A TO CHAPTER 3
CLASSES OF ENGINEERING CHANGE PROPOSALS
1. Class 1 Engineering Change Proposal. Class 1 Engineering Change Proposals must be reviewed by the CCB, regardless of priority. Engineering Change Proposals usually attract a Class 1 classification if they either: a. b. c. impact on form, fit or function of a CI, particularly interface and compatibility characteristics; affect lifecycle costs (at a system level) by 5% or more; introduce significant and measurable change in the operational or performance characteristics of the capability, including reliability and logistic supportability or processes; require Government Furnished Equipment (GFE) to implement or impact upon GFE; require retrofit action; affect survivability; have safety or security implications (including safety-critical software issues); require amendment to delivered operational or maintenance documentation; require operator or maintainer training if accepted; may push project scheduling or milestones outside tolerances; or affect guarantees or warranties on deliverables.
d. e. f. g. h. i. j. k.
2. Class 2 Engineering Change Proposal. Any change to a baseline that is not Class 1, or any proposal to substitute a component with one that is built to the same Build Standard, is Class 2. Examples are documentation amendments to correct errors or update version/edition numbers, manufacturer-imposed changes to the internals of a Defence spare that do not effect the item’s functional or physical performance, and substitution of technical components built to the same Build Standard.