The Lean Services Architecture (LSA) is an open schema-based architecture that provides a Services Orientated Architecture (SOA) designed for mobile, low powered and ‘things’.

The LSA is software-only, with low implementation overhead, making it suitable for lean (low powered) computing devices and lean (low bandwidth) communications. It is operating system, programming language and transport protocol neutral. It was designed and proven for the tactical military domain but can be used in any other environment.

The LSA Specification was invented and authored by 2iC and published under the Open Government Licence by the UK Ministry of Defence.


2iC Decentralised Operating Procedures (DOP) allow the practical application of Business Processes to the lean technology environment and provide a flexible way to coordinate distributed systems supplied by multiple vendors. DOPs achieve business outcomes by defining the interactions across distributed systems. Every event, activity and data flow is in the context of an objective and is tagged with security, priority and context information, enabling effective systems interoperability. Once designed, DOPs are deployed to run alongside existing technology with negligible overhead.


The 2iC Tactical Cross Domain Solution is a further enhancement of the Lean Services Architecture and Decentralised Operating Procedures (DOP) capability. Designed to enable flexible Assured Interoperability between systems and networks. It is the missing piece needed to ensure the flexible coordination and two-way free-flow of information between different trust domains. These may be defined by different security classifications, safety critical boundaries, departmental or national boundaries. Each trust domain will have different management and ownership.

This innovation won the DSEI Innovation Challenge Award, which seeks the innovation, not yet in service, most likely to make the biggest impact on defence and security.