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Computerized Optimization Model For Predicting and Analyzing Support Structure (COMPASS)

Last Updated : 01/27/2023

The Computerized Optimization Model for Predicting and Analyzing Support Structures (COMPASS) is a PC-based software tool designed to assist project managers in analyzing various maintenance concepts for their system and related equipment. COMPASS is used to simultaneously optimize maintenance and supply functions, while achieving a desired operational availability goal. COMPASS features maintenance and supply optimization, user-defined concept evaluation, evaluates multiple levels of maintenance, evaluates contractor support, and evaluates discard alternative decisions. COMPASS is specifically helpful in conducting Level of Repair Analysis (LORA) studies. A LORA is an analytical methodology used to determine the maintenance level where the removal and replacement, repair, or the discard of an item should be performed. COMPASS is the Army approved system level LORA model.

Note: Users who are unable to access the site can e-mail the USARMY Redstone Arsenal LDAC Mailbox TSB SmartDesk at [email protected] for PowerLOGJ2, SYSPARS, COMPASS and CASA software tool or product support.

IMPORTANT NOTE: US Army Logistics Data Analysis Center (LDAC) has advised that their "COMPASS Lite" tool is no longer supported, and recommends that this version of COMPASS be used instead.

Processes Supported

Integrated Product Support Elements Addressed

Departments Associated

  • Army
  • Navy / Marine Corps
  • Air Force 


This tool was identified as part of a product support analytical tools database provided solely to assist defense acquisition workforce professionals to identify best value product support solutions which optimize system readiness and life cycle cost. Neither the Department of Defense or the Defense Acquisition University provide any warranty of these tools whatsoever, whether express, implied, or statutory, including, but not limited to, any warranty of merchantability or fitness for a particular purpose or any warranty that the contents of the item will be error-free. This analytical tools database should under no circumstances be considered as being all-encompassing, and is in no-wise meant to endorse the capabilities or products of any particular individual, company, or organization.

Part of the LDAC Tool Suite

For more information on the other tools available, visit the DAU LDAC Tool Suite page.


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