Recent developments in the differential equations of design and conformance quality

This research proposes some new differential equations to be used
by practitioners and theorists when investigating design and conformance
quality. Although those two quality features have been already extensively
studied, the literature reveals several limitations that this research attempts to
overcome. The differential equations used so far in game theory are analysed,
identifying their tradeoffs, interactions and limitations and then original
equations are developed to explore both design and conformance quality. In
order to study conformance quality, its differential equation should consider not
only failures but also prevention and appraisal. The differential equation of
design quality does not always increase, but instead, it increases and decreases
over time according to a number of external factors. Design and conformance
quality generate several economic tradeoffs and managerial interactions that
firms need to consider when implementing a total quality strategy.