Answer:
Waterfall
Explanation:
The waterfall model development strategy may be classed as a flexible design architecture exhibiting a linear operational sequence with each phase being largely dependent on the preceeding phase. Each phase of the waterfall has clearly defined task ; usually starting with the requirement phase where use cases and required docs are gathered, then the design, which caters for the software architecture, the the implementation (which is the main software build) followed by verification and maintainance.
We can see that the waterfall method is sequential and not extremely complex as it follows an entirely linear process.
