S&OP is valuable for businesses because it helps in planning for the future. When done well, it can help your business to grow and succeed.
Forbes said, "A more effective and holistic S&OP process goes straight to the heart of improved business performance, unifying the entire end-to-end supply chain, from the supplier’s supplier to the customer’s customer."
In order to achieve this, look at the big picture and plan as far into the future as you can. Track your metrics, use your data, and do your best to anticipate changes.
Successful S&OP helps you prepare for the good and the bad so you're ready to tackle it head on.