U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


  1. Home
  2. Logistics Demonstrations (Log Demo)

Logistics Demonstrations (Log Demo)


A part of developmental test and evaluation (DT&E) used to evaluate the adequacy of the system support package and ensure the user unit has the logistical capability to achieve initial operational capability (IOC). A logistics demonstration includes the nondestructive disassembly and reassembly of a production representative system using its related peculiar test, measurement, and diagnostic equipment (TMDE); tools; training devices; technical publications; and support equipment.

General Information

A Log Demo is conducted by the Program Manager (PM) and the Product Support Manager (PSM) during the acquisition process to evaluate the readiness the SSP.  Key factors of this demonstration are the following: 

  • It includes both remove/replace and diagnostics/prognostics element of field level maintenance, both operator and maintainer
  • It is conducted as a standalone (status quo) or incremental
  • The final Log Demo is typically conducted before IOC using Low Rate Initial Production (LRIP) assets

Incremental Log Demos:

The Log Demo provides data to evaluate:

  • Supportability
  • Adequacy of maintenance planning
  • Technical publications
  • Logistics data
  • Training and training devices
  • Manpower and Personnel Integration
  • TMDE
  • Common and unique tools
  • Spares and/or repair parts

Challenges to the incremental Log Demo process:

  • Managing Log Demos around major design updates
  • Training for data collectors and use of after action reviews
  • Availability of field-representative personnel and training requirements
  • Cost and benefit for:
    • Commercial and Non-Developmental Items (NDI)
    • Systems requiring little maintenance
  • Log Demo entrance criteria and acceptance
    • Validated technical manuals
    • “Go with changes” vs. “No-Go” tasks
  • Task tracking of system configuration and task completion

Differences between Log Demo and Maintainability Demonstration (M-Demo) include: 

  • The Log Demo verifies the product support package, i.e., the integration of each of the Integrated Product Support (IPS) Elements into the design
  • M-Demo only verifies maintainability aspect of design only
  • M-Demo, strictly speaking, assumes "perfect world", i.e. trained personnel, immediate receipt of parts, adequate technical publications, perfect support equipment and tools, etc.
  • Most program offices mix aspects of Log Demo in with M-Demos