Select Product Concept(s)
Step 1. Identify Concepts
Over the course of the break, all team members were giving the task to generate ten different ideas. The focus of the activity was to generate a large quantity of ideas without passing judgment. All ideas were welcomed even if at first they may appear infeasible.
Following the holiday break, the group reconvened and shared ideas. After immediately eliminating a few ideas, for example a steam powered motor, and accounting for redundant ideas, six potential lifting concepts remained. These concepts are labeled A-F, with concept G representing the existing parallel bar system use at Nazareth.
See below for sketches of all concepts.
Step 2. Rate the Concepts
Concept Screening Matrix
A Concept Screening Matrix was prepared, with the current design selected as the reference concept. All six lifting mechanisms were compared to the reference concept and rated either +, -, or 0. As seen in the Pugh diagram below, following the ranking, three concepts were selected to continue. These concepts were Concept D - Power Screw, Concept E - Trailer Jack, and Concept F - Scissor Jack.
Step 3. Rank the Concepts
Concept Scoring Matrix
The three remaining lifting concepts were further ranked against each other. For each selection criteria, one concept was chosen as the reference concept and given a value of three. The other two concepts were than assigned a value with respect to the reference. As seen in the Pugh diagram below, Concept E, or the trailer jack, was selected as the concept which we would work to develop.