Management Science, Vol. 37, No. 8 (Aug., 1991), pp. 909-925 (17 pages) This paper is concerned with the general dynamic lot size model, or (generalized) Wagner-Whitin model. Let n denote the number ...
We give an O(n log n) time algorithm to preemptively schedule n equal-length jobs with release times on two identical, parallel machines so as to minimize the mean flow time. The complexity of the ...