Design 51, Concept Stage

To serve as a reference, an example of a pohcy/procedure statement on safety in the design process follows. Its intent is to announce that hazards are to be addressed during early design concept stages, and as an integral part of a concurrent engineering program. 

The protocol must include the proposed tentative specifications of the in-process product with the acceptance criteria and directs the finalization of the specification at the end of the development stage. The specification should be proposed based upon the product design that is, the specification includes the size, shape, impurities, and nature of the materials, such as viscosity and tension. Developing the specifications of the final product and parts for assembly must be performed to specify the product efficacy and product liability based on the design concept and scientific data, such as stability data. 

In the concept stages of a project, when details of the design are not known, emphasis should be put on the several accidental scenarios with a potential of impacting the main safety functions. 

We have presented a complete analysis of the Cornell mm-wave spectrometer using quasioptical techniques. We also have developed a quasioptical formalism with sufficient flexibility to predict the performance of a novel reflection mode spectrometer with variable input coupling and transmit-receive duplexing based on polarization coding and we present a practical realization of these design concepts in Earle et al. (1996b). At every stage we have chosen parameters that correspond to practical performance values and measured response. 

In the first stage, only symbolic attributes are used to identify design concepts. In the second stage, a limited number of numerical attributes is used to conduct simplified calculations. Finally, in the last stage, all meaningful numerical attributes are used. 

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