The previous sections of ANSI/ISA-88.01 have talked about the separate entities of equipment and recipes. This chapter will begin the discussion of Section 6, which describes the activities that take place in a system composed of those entities. In other words, this chapter will show how the things and concepts previously discussed interact when used to produce batches.

As you might expect by now, the terms activity and function are words in general use that have special meanings in this section of 88.01. There are only seven batch process control activities and one of them is set outside the scope of the standard. Each activity is decomposed into functions that describe things that may be done by the activity. Another way of looking at this is to consider each activity as a department in an organization. Each department contains people that perform the functions of that department.

This chapter should improve your understanding of why 88.01 said what it said so far. Don't be shy about going back and re-reading something in a new light. 88.01 cannot be understood after the first reading unless you read it with this book as a companion. Even then, you may not reach full understanding until you have designed the control for a complete process cell and started it up.

The first three activities listed below had no interface to the functions of a business at the time that 88.01 was published. They are discussed in this chapter as they were written in...