Process Management Principles for Increasing the Energy Efficiency

Of the seven types of muda or deadly wastes in lean

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Unformatted text preview: y wastes", in lean manufacturing, all generally can be expected to cause extra energy to be used that would not be used if the waste (lid not exist[4]. Wasted energy, and utilities in general, are not specifically considered muda. In CCA, we generally focused on the waste of "overprocessing", in the sense of non-value added electricity used in process equipment. Some further classify muda into two levels{44]. Type One muda is defined as activities that create no value but seem unavoidable with current technologies or production assets. Type Two muda are activities that create no value and are immediately avoidable. In terms of electricity used in overproduction, Type One muda includes the electricity required to pre-heat an oven and the extra electricity used beyond what is needed for the product by a piece of equipment that is not right-sized. While we documented several cases of Type One overprocessing muda during our improvement process in CCA, and ultimately even eliminated one (see Appendix C), our focus during the DMAIC process was mainly on Type Two overprocessing muda. The case studies in this...
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