This part of BS 5702 describes ways of applying measured data
statistical process control (SPC) charts to short runs and small mixed
batches where the sample size for monitoring is restricted to one. It
provides a set of tools to facilitate the understanding of sources of
variation in such processes so that the processes can be better
managed.
The charts described are process- rather than product-focused. The
user can plot, monitor and control similar characteristics on different
items, or different characteristics on an item, on a single control chart.