Which of the following is not a correct objective of the aggregate planning process? Maximise customer service Minimise changes in production rates Maximise utilisation of plant and equipment Maximise inventory investment

The objective that is not correct for the aggregate planning process is "Maximise inventory investment".

Aggregate planning is a process used by operations management teams to balance production and demand in a way that minimises costs. The main objectives of aggregate planning include:

1. Maximising customer service: This involves ensuring that products are available when customers want them. This can involve holding some inventory, but the goal is to minimise the amount of inventory held while still meeting customer demand.

2. Minimising changes in production rates: Sudden changes in production rates can be costly. It's more efficient to produce at a steady rate.

3. Maximising utilisation of plant and equipment: This involves ensuring that the company's production facilities and equipment are used as efficiently as possible. This can help to minimise costs.

However, maximising inventory investment is not a correct objective. Holding large amounts of inventory can be costly due to storage costs, the risk of obsolescence, and the tying up of capital that could be used elsewhere. Therefore, the goal is usually to minimise inventory levels while still being able to meet customer demand.