RESOURCES. Reference A Matter of Spatter 23 The International Exhibition Post-Exhibit Science Lesson of Sherlock Holmes ï2013 Angle of impact The acute angle formed between the direction of a blood drop and the plane of the surface it strikes.Bloodstain Evidence that liquid blood has come into contact with a surface.ESOURCES. Reference A Matter of Spatter 23 The International Exhibition Post-Exhibit Science Lesson of Sherlock Holmes ï2013 Angle of impact The acute angle formed between the direction of a blood drop and the plane of the surface it strikes.
Figure 1 Â­ The design process with the three detailed stages of concept development. The initial concept development process is important because a better design process leads to. a better design outcome. Decisions made during the early stages of design tightly constrain. future options.
The spiral model is a software development process combining elements of both design and prototyping-in-stages, in an effort to combine advantages of top-down and bottom-up concepts. The spiral model was defined by Barry Boehm in his article A Spiral Model of Software Development and Enhancement from 1985. This model was not the first model to discuss iterative development, but it was the first model to explain why the iteration matters.