GCAPはPYRAMIDオープンアーキテクチャミッションシステムの採用で高速かつ安価に改修可能だが、各国のカスタマイズが
どの程度可能か、またプログラムの一貫性を損なわずにどこまでの乖離が許されるかを評価することが重要とのことだな。

A second core requirement to counter future evolving threats is for the system to be an ‘open system’ susceptible to spiral and
even continuous development. For GCAP specifically, the MoD has embraced this iterative development with its adoption of the
PYRAMID Open Mission System, an open systems approach that will make upgrades more rapid and reduce software maintenance costs.
However, while this approach is welcomed, it will be important to assess the extent to which spiral development and open system
architecture allow for national customisation, and how much divergence can be permitted without endangering programme coherence.