Page 236 - The Art of Designing Embedded Systems
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APPENDIX B
A Simple Drawing
System
Just as firmware standards give a consistent framework for creating
and managing code, a drawing system organizes hardware documentation.
Most middle- to large-sized firms have some sort of drawing system in
place; smaller companies, though, need the same sort of management tool.
Use the following standard intact or modified to suit your require-
ments. Feel free to download the machine-readable version from www.
ganssle.com/ades/dwg.html.
Scope
This document describes a system that:
guarantees everyone has, and uses, accurate engineering docu-
ments.
manages storage of such documents and computer files to make
their backup easy and regular.
manages the current configuration of each product.
The system outlined is primarily a method to describe exactly what
goes into each product through a system of drawings. A top-level configu-
ration drawing points to lower-level drawings, each of which points to spe-
cific parts and/or even lower-level drawings. After following the “pointer
chain” all the way down to the lowest level, one will have access to:
Complete assembly drawings including mod lists.
A complete parts list.
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