3. Horizontal distance from pivot to spring
4. Free height of the reinforcement spring
5. Free height of the main spring
The engineers build a prototype hinge mechanism in which
all these factors can be varied over certain ranges. Once
appropriate levels for these five factors are identified, an
experiment can be designed consisting of various combinations of the factor levels, and the prototype hinge can be
tested at these combinations. This will produce information
concerning which factors are most influential on latch check
effort, and through use of this information the design can be
improved.