Discuss how their layout and organization might change for a simple task such as making a sandwich, as volume and variety change. 'If you were making a sandwich for a friend how would you do it'? 1) the kind of sandwich they want (limited only by the availability of ingredients in the kitchen), when they wanted it (it could be made to order) and how much it could be customized? 2) 'If you were making sandwiches for a whole group of friends who were due to arrive in an hour's time, how would your process change'? 3) 'If you were making 5,000 sandwiches a day for a supermarket, how would you wish to organize the production system'?