Comment It's Called the Avalanche Model (Score 1) 133
They already have a name for this.
From the wiki:
The Avalanche model is a Software Engineering project management anti-pattern, it is a combination of a sequential process such as the Waterfall model and Agile software development methodologies. It is the result of a Project Manager's attempt to apply Agile techniques to a project, when all they really understand or were taught was a sequential development cycle. Instead of breaking the project into parts that each sequentially go through the phases of development, the entire project inhabits all phases of development simultaneously. Usually the result of attempting to use the Avalanche model is mass confusion, wasted effort, and a product that cannot meet the specifications of any requirements document.