Process capability study of domestic organic waste composting process - a pilot scale case study in rural India Online publication date: Fri, 12-Apr-2024
by G.V.S.S. Sharma; M. Srinivasa Rao; V. Rambabu; M.S. Atchuth Prasad
International Journal of Environment and Waste Management (IJEWM), Vol. 33, No. 4, 2024
Abstract: This study enlists the different factors controlling the domestic waste composting process and subsequently gives details on the process improvement of identified critical-to-quality (CTQ) characteristics of the house hold organic waste composting process. Define-measure-analyse-improve-control (DMAIC) approach is adopted for confirming an enhancement in the process capability levels of the CTQ characteristic. Ishikawa diagram is used for finding the potential causes responsible for the process deviation. Prioritisation of corrective actions for causal factors are carried out by means process failure modes and effects analysis (PFMEA). Process monitoring charts are used the study of variations in the process capability index of the process, at the four sigma level, which is equal to the value of 1.33. By employing DMAIC approach, the CP and CPK registered final values of 3.29 and 2.26 from the initial minimum values of 0.988214 and 0.21496 respectively.
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