Based on the requirement engineering method of problem frame, the problem frame of WSoS requirement(WSoSR) is built which is consisted of requirement, mission domain, task domain, operation domain and system of systems(SoS) domain.
The nationalist movement, the South West Africa People's Organisation (Swapo), was condemned as communist by Pretoria, but consisted of devout, mission-educated guerrillas, who understood only too well the message of the Gospels learnt from German, Finnish and English missionaries.
The American Pioneer Venus project consisted of two separate missions.
The mission consisted of two phases: a primary mission which lasted from 1 March 2012 to 29 May 2012, during which the spacecraft had a mean altitude of 55 km above lunar surface, and an extended mission which lasted from 30 August 2012 to 14 December 2012.
Halo Wars consists of 15 missions with varying degrees of difficulty.
The single-player campaign consists of thirty missions, split into ten for each race.
Either campaign consists of ten missions (referred to as "phases" in the game) in each of the six locations.
Most quests consist of combat missions, but some involve the player interacting with local characters during visits to settlements.
Levels consist of several missions, which are based around the destruction of enemy weapons and installations, as well as rescuing hostages or prisoners of war, or capturing enemy personnel.
The game features a campaign mode consisting of 14 missions that can be played co-operatively, and a multiplayer mode where a maximum of 32 players can compete against each other in numerous types of deathmatch and objective-based games.
