In process manufacturing, input materials or products or both are generally measured by weight or volume because they are agricultural products, powders, liquids or gases which can’t be counted.
There are two main categories of process manufacturing.
- (1) Continuous production processes involve non-stop production of chemicals, petrochemicals, and other high volume standard product that seldom varies in formulation.
- (2) Batch production processes in which materials are divided into batches which undergo operations such as heating, mixing, and chemical reactions to produce products such as food, beverages, and paint.