Glossary · Glossary
MOSA
An acquisition and engineering strategy that builds systems from modular components with open, published interfaces, so parts can be upgraded or replaced by different vendors. It is now statutory guidance for major U.S. defense programs to avoid vendor lock-in.
An acquisition and engineering strategy that builds systems from modular components with open, published interfaces, so parts can be upgraded or replaced by different vendors. It is now statutory guidance for major U.S. defense programs to avoid vendor lock-in.
Why it matters
A modular open-systems approach lets a program swap or upgrade parts through published interfaces instead of being locked to one vendor; for the government it is now a directed acquisition requirement.
Standards & authorities
- 10 U.S.C. 4401 (Modular Open System Approach requirement)
- MOSA Tri-Service Memorandum (2019)
Related in glossary
Frequently asked
What is MOSA?
An acquisition and engineering strategy that builds systems from modular components with open, published interfaces, so parts can be upgraded or replaced by different vendors. It is now statutory guidance for major U.S. defense programs to avoid vendor lock-in.
Why does MOSA matter for defense and counter-UAS operators?
A modular open-systems approach lets a program swap or upgrade parts through published interfaces instead of being locked to one vendor; for the government it is now a directed acquisition requirement.
What standard or authority governs MOSA?
MOSA is defined or governed by 10 U.S.C. 4401 (Modular Open System Approach requirement), MOSA Tri-Service Memorandum (2019).