Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Hierarchical Control of engineering Change Data

IP.com Disclosure Number: IPCOM000074372D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 16K

Publishing Venue

IBM

Related People

Norton, DH: AUTHOR

Abstract

The data base design described here uses a "from-through" change level technique to maintain a complete history of engineering changes to hierarchically related assemblies, which may be nested to any desired level.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Page 1 of 2

Hierarchical Control of engineering Change Data

The data base design described here uses a "from-through" change level technique to maintain a complete history of engineering changes to hierarchically related assemblies, which may be nested to any desired level.

The notation used is that for Data Language/I; however, the principle applies whether DL/I is used or not. Consider the following arrangement of data base segments:

(Image Omitted)

The ASSEMBLY segment with a key of "assembly number" is the root segment and contains such common information as the description, make-or buy decision, etc. Each part or assembly in the data base has a record which begins with the ASSEMBLY segment.

The CONTROL segment with a key of "change level" is used to maintain the history of changes to the assembly and contains information such as the change authority, change date, etc. The FINDSUB segment with a key of "find number" together with "next lower assembly number", or "subpart", is used to associate find numbers with subpart numbers and contains the "highest applicable change level" for the find-subpart combination.

The SUBREV segment with a key of "applicable change level" is used to maintain the detailed information concerning a find-subpart combination and contains quantity in the assembly, unit of measure, drawing upon etc.

The USAGE segment with a key of "next higher assembly" is used to provide an upward pointer which associates records in the data base in a configuration. A...