In which situations do we incur this type of waste?
Where do we do a good job of avoiding this type of waste?
Break into groups of 2-3 people, preferably with a mix of roles in the groups. This helps to build awareness of the waste everyone else is dealing with on your team. Then, each group selects their first topic and spends a short amount of time writing post-its to answer the two questions above. Limit it to 2 or 3 minutes per topic and 2 post-its per person for each topic to avoid getting swamped with data. When the timebox is up, each group cycles to the next category until everyone has had an opportunity to contribute to each.
What themes are emerging? What do participants notice? Use dot-voting to decide which topics are important enough to further discuss in the next phase.