P08427: LED Lighting Technologies for a Sustainable Entrepreneurial Venture
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Establish Specifications

Table of Contents

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Initial Engineering Specifications

The list of initial engineering specifications found in the table below were largely based on assumptions so as to provide a starting place for benchmarking and concept generation. These concepts were largely based upon the guessed at need established during the Design Project Management class and the Project Readiness Package preparation process. In the first week of Senior Design, the team met to review and modify the needs to a reasonable starting point. The specifications below are representative of that point in the design process.

Initial Engineering Specifications

Initial Engineering Specifications

List of Metrics

The initial specifications were altered over time as benchmarking showed that in some fields, such as battery life, we were shooting for an unattainable goal. Additional alteration to the list came from the deletion of the solar energy specifications and the addition of the Biking Power Module specifications after the concept generation process took us in that direction. After hearing back from our contacts on the ground in Haiti, we were able to further refine the specifications and add some for the initially overlooked need for safety. The table below presents the Engineering Specifications in their final form. These specifications will allow for the product to meet all customer needs. The individual needs met by each specifications are indicated in the third column of the table and in the Needs-Specifications comparison matrix in the following section. Finally, and also very import for the scope of this project, all of the specifications should be able to be met in the "ideal" condition by the proposed design.

Engineering Specifications

Engineering Specifications

The MS Excel version of the Customer Needs, Engineering Specifications, and Comparison Matrix can be found here

Some of the initial light distribution calculations were done at this website

Customer Needs & Engineering Metrics Matrix

The engineering specifications detailed in the previous table have been directly compared to the earlier established customer needs. This action allows us to see which needs are serviced by which metrics and conversely, which metrics specify values for which of the needs. The MS Excel version of this matrix along with the needs and specifications mapped can be found here

Customer Needs as Related to Engineering Metrics Matrix

Customer Needs as Related to Engineering Metrics Matrix

Reflection on the Results and the Specification Establishment Process

The final specifications for the project have been listed above. The process of establishing these metrics was not as simple as one might have thought. A significant amount of research into lighting had to be completed before reasonable values could be assigned. As the design work began it became evident that some of the specifications would have to be reworked due to the fact that their original requirements would be impossible with the technology available for the product. The final results are significantly more modest than some of the original thoughts, but they will be achievable within the scope of the Senior Design Process and will continue to meet the needs of the end customer.


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