The tool works from a simple table. Each row is one governance body. The columns are Governance Body, Members, Mandate, Decision Rights, Cadence and Chair. Three of those are marked as required: the body, the mandate and the chair.
In the sample, the Steering Committee has Sponsor, MBB and Process Owner as members, holds a mandate of strategic oversight, decides on funding and scope changes, meets quarterly, and is chaired by the Sponsor. The Ops Review brings together the Process Owner, the AP Manager and the Black Belt, carries the mandate for operational performance, decides on process changes and resources, meets weekly, and is chaired by the Process Owner.
The Daily Huddle is the AP team and the AP Manager. Its mandate is daily execution. Its decision right is issue triage. It meets daily and the AP Manager chairs it. The Audit Forum is the Black Belt and the Process Owner, with a mandate of compliance assurance, a decision right over corrective actions, a monthly cadence and the Black Belt in the chair.
Write the mandate in a few words, not a paragraph. If you cannot say what a body is for in five words, the body probably overlaps with another one.