M. Cochand et A. Gaillard, ON PREEMPTIVE SCHEDULING - A GENERAL SETTING FOR THE 2-PHASE METHOD, Discrete applied mathematics, 65(1-3), 1996, pp. 157-166
The validity of the two-phase method for preemptive scheduling is esta
blished in a wide context by means of a classical result of polarity.
A geometrical interpretation is given and relations to minimal length
almost nonpreemptive scheduling are discussed in this general setting.