2. Literature review
We are interestedhere in the concurrent issues of (1) product location, (2) picker home base
location, and(3) allocating products to each picker for an ‘out andback’ picking line so that the
expected order cycle time is minimized. The issue of product location for rectangular or linear storage
racks has receivedmuch attention. Hausman et al. [11], Graves et al. [12] andJarvis andMcDowell
[13] among others examine a number of product location strategies for a single server operating