I agree with Franklin, because it's a trend at the quality world to demand any improvements, often auditor wants to see SPC (and FMEA and QFD and blabla).

But it could (resp. will) be helpful to record such datas.In view of ISO9001 it's your own decision to - or not to - collect and record any SPC-relevant datas. Most auditors aren't aware of IPC-standards and are using their abstract/multiaplicable ISO9001/2/3-checklists, otherwise (a 9001-IPC-auditor) would ask along the IPC- & J-STD-paragraphs.

IF you intends to obtain J-STD-001B, you should read §3.1 (table 3-1), 3.4, 11.1 (table 11-1) and 12.2 to take your own decisions about the degree of implementation.

Bernhard (also a QA mngr)