Historical Background When the S&OP model came into existence, the fundamental agenda of the model was to highlight the sales review, the inventory status, the supply plan model and the financials (Umble, Haft & Umble, 2003). As mentioned above, Grimson and Pyke (2007) also developed an S&OP maturity model, which identified S&OP process adoption strategies … Continue reading S&OP Planning a Model