Engineering Documentation Control / Configuration Management Standards Manual

Chapter 7Part Numbers

Purpose

• To define the attributes of the company part number.

Applicability

• All items and their documents to be released by this CM function.

Policy/Practice

• The part number will have the following characteristics:
  1. Document number embedded in the part number (avoids cross-references).
  2. Tabulation ability (see below).
  3. Number of digits in length expected to last 50 to 100 years.
  4. Minimum significance (see the article attached).
  5. Compliments a predetermined naming convention (title and description) or class code in order to avoid reinventing the wheel, to find substitutes, etc. (not part of the part number).
  6. On non-interchangeable (part number) changes, only the tab number will change.
• All part numbers will be eight digits numeric according to the following convention:

• The dash is shown only for example, not to be used on the document or in the database (avoids unnecessary keystrokes).
• The tab number is a convention used in the drawing title block and in the database as follows:
  1. If the document does not represent a physical item (document only) then use … “00”
  2. If the document is tabulated (variations of nearly identical items) use …….. “XX”
  3. The first part delineated on the document will always (tabulated or not) be….. “01”
• A crude but sometimes adequate form of class coding may be used by a couple of alpha/numeric prefix characters — if necessary to ...