Purpose

• To indicate the proper method of tabulating similar item, part or component documents.
• To indicate the proper method of changing tabulated documents revision level and part numbers.

Applicability

• All design documents processed by this CM function.

Policy/Practice

• Similar items shall be tabulated (also see the Part Numbers Standard).
• Use of the tabulation document will be limited to items having one or two variable characteristics. More than two variable characteristics require the approval of the CM manager. This is necessary because the drawing or spec with three or more variable characteristics is very hard to understand.
• An “XX” will be placed after the document number in the title block of the drawing/spec. This will serve as a flag for the user of the document to know that the document is tabulated; Example: 123456XX.
• The “00” tab shall be reserved for the document itself. The first item documented on such a drawing/spec shall always be 01, the next 02, etc. Tab 99 is reserved for CM use only.
• A chart (tabulation) will normally be placed in the upper left corner of the document – showing the variable characteristics of the item with the tab number for each.

  Example:	Tab	Length “L”	Width “D”
  	01	2.5 inches	1.0 inches
  	02	3.0 inches	1.0 inches
  	03	3.0 inches	1.5 inches
  	04	4.0 inches	2.0 inches

• Fixed relationships between the tab number and the variable characteristics (such as 01 = 1” width, 02 = 2” width, etc.) shall only be done with the written approval of the CM manager.
• In the unlikely event that a non-interchangeable change is made to the item tabulated, and if a new part number is required (see the Interchangeability Standard), a new series of tabs must be added to the chart – In the above example: 05, 06, 07, 08.
• When non-interchangeable changes are made per the above example the tabs 01 thru 04 “where used” must be examined for proper use/designation under the company’s “Inactive/Obsolete” standard.
• Any change made to the document after release must be done by ECO and result in an increase in the document revision level.
• The latest document revision level will be indicated in the ERP Item master file on the 00 tab only (Documents have Revs, parts don’t). If the ERP requires entry of a revision level for each part, all other tabs shall be entered as rev level 99 (Drawings have Revs, parts don’t).
• Purchasing and Production Control/Planning must be brought into a discussion on the use of this convention, especially if the MRP/ERP system produces Purchase Orders or Mfg Shop Orders.

Procedure

• None required.

Primary Responsibility

• The CM manager will be responsible for maintaining this standard in a current status.

Authorization