Sales and Operations Planning (S&OP)
Most pharmaceutical companies use S&OP systems in order to perform long term planning of their production. Inventory is a necessary evil.
S&OP is only a visibility tool for long term planning. All the heavy lifting is done by the planners manually trying to make a long-term plan work for actual short-term execution.
Planning is probably the second oldest profession in the world! Just about everything we do requires some form of planning. What really matters is the quality and accuracy of the plans.