P08428: LED Lighting for Sustainable Venture
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Select Product Concept(s)

Table of Contents

We carried these steps out in full for the most complex problem, and then used an abbreviated method for the remaining concept selections.

Step 1. Prepare the Selection Matrix

From our System Subfunction Solutions list, we drew our list of concepts for the problem of dispersing light energy.

Step 2. Rate the Concepts

Each concept was rated with either a (+), a (-), or a 0 for each of several selection criteria. A (+) meant that it was a superior concept to our reference, an (-) meant it was inferior, and a 0 meant it was comparable. For Light Dispersion, our criteria were

Once each concept was rated, a net score was found. Any concept with a negative net score was discarded, and we proceeded to step 3.

Step 3. Rank the Concepts

Our selection criteria were assigned a weighting based on our customer needs. We again evaluated our concepts relative to a reference concept, this time on a 5-point scale with 3 being equivalent to the reference. The ratings and weights were combined to produce a weighted score for the concept relative to the criterion. Finally, the weighted scores for each concept were summed, and the concepts ranked relative to each other.

Step 4. Combine and Improve the Concepts

Once the concepts were ranked, we investigated them further to see if there were ways to modify them to improve their scores. For some concepts, there was a clear "winner" that we chose to continue with. For others, a combination of two or more concepts was found to be superior.

Step 5. Select One or More Concepts

Finally, one concept for each subfunction had to be chosen.

Step 6. Reflect on the Results and the Process

Pugh Matrices

Concept screening matrix and Pugh Matrix for Light Dispersion

Concept screening matrix and Pugh Matrix for Light Dispersion

Pugh Matrix for Applying electrical energy to LEDs

Pugh Matrix for Applying electrical energy to LEDs

Pugh Matrix for Sensing/Switching

Pugh Matrix for Sensing/Switching

Pugh Matrix for Power Supply

Pugh Matrix for Power Supply

Pugh Matrices (Excel)

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