[IKE]

There are 2 types of in-frequents that should be handled differently.

#1. Splitting time with other actitivities, but has a known schedule and is dependable. (Can give you 8 hrs. every Saturday, or can help out Mondays and Wednesdays...)
#2. Undependable. Randomly shows up whenever.

Type #1 can actually be a really great asset if used properly. many examples have been given above for just such assignments. Keep them involved with the bigger picture as well. The key is these folks get quality assignments that require less continuous support (bumpers, pit display,....)


Type #2. You need to convert them to a type #1. Explain to them the importance of knowing when they will be there. On days when they just "show up" give them less desirable assignments. On days when they let you know more than 24 hours in advanced, give them better assignments.

If your team is not able to use a predictable 50 man hours (an 8hrs on Saturday person) effectively, then you need to work on your leadership. If the person in question is a random, that is their fault, but your leadership team has the responsibility to let them know what is expected of them.