Bout, C.A.

labour labour volume customer volume service process queueing theory queueing node 2 retailing model nooteboom theory result relation arrival service times / labour cost queue opening time arrival process optimization problem threshold labour distribution opening approximation shop types problem cashier labour cost relation shop type poisson journal node 1 threshold analysis j.b.g number thurik frenk opening hours queueing model productivity poisson process function poisson arrival process research / g / shop keeper wiley optimization non-homogeneou assumption system amount yield order labour costs proof characteristic minimization problem service target service time probability check-out point keeper self-service shop service customers node 1. state capacity labour requirement service capacity non-homogeneous relation activity inequality level difference nbue-distribution production