Lean Software Engineering

If you make it cumbersome to document work standards, then people may resist updating them or even following them. So anything you can do to make standards easier to use is probably worth the effort.

When you draw your heijunka board, leave room at the bottom of the columns to document the standards. If the standards are simple, you can write them directly on the board (part of why whiteboards are so handy for this purpose). If the standards are too detailed to write directly, then try making the columns wide enough to attach a single printed page with tape or magnets, e.g. 9 inches (for U.S. letter) or 22 cm (for A4).

If you go with printed pages, then a wiki can reinforce the message of shared ownership, while also creating an audit trail and facilitating root cause analysis. Not everybody is comfortable with editing wikis, so in that case a simple document will suffice. Even so, versioning is still a nice thing to have. If you go with the low-ceremony whiteboard method, take a photo from time to time.