Guy, that is a great exercise! I'll try that one and see the response.....do you have any examples of the completed diagram that are correct?....
We did a task to demonstrate the effectiveness of SCRUM that the head enjoyed:
4 teams to represent 4 project lifecycles:
1> a team that creates a plan upfront and does not deviate from this plan and does it step by step. (waterfall)
2> a team that can do a short plan, do a bit of work, then stop, re-evaluate and change plan if needed (agile)
3> a team that works in different areas but can change plan (agile, but working remotely)
4> a team not allowed to plan, just do it.
The task is to use objects in the room to build a bridge that will hold a toy car. Points are given for height of bridge, multiplied by length of bridge. The task master set out a load of kit on the table and the group is given 15 minutes to plan - but must not do any work on building.
The task then begins and bridge building takes place.
The groups have 30 minutes to complete it then another 15 minutes to reflect.
Half way through an additional requirement is added - the bridge must survive a storm (hairdryer).
......the trick is that "anything" in the room can be used. We were in the board room so I suggested to use the table! We won.....and I was in the "not allowed to plan" team so it stuffed up the point of the exercise a bit!
I think your coffee shop example is a great one!