Retail store scheduling for profit |
| |
Authors: | Nicolas Chapados,Marc Joliveau,Pierre L&rsquo Ecuyer,Louis-Martin Rousseau |
| |
Affiliation: | 1. Université de Montréal, Montréal, Canada;2. École Polytechnique de Montréal, Montréal, Canada;3. Inria–Rennes, Rennes, France |
| |
Abstract: | In spite of its tremendous economic significance, the problem of sales staff schedule optimization for retail stores has received relatively scant attention. Current approaches typically attempt to minimize payroll costs by closely fitting a staffing curve derived from exogenous sales forecasts, oblivious to the ability of additional staff to (sometimes) positively impact sales. In contrast, this paper frames the retail scheduling problem in terms of operating profit maximization, explicitly recognizing the dual role of sales employees as sources of revenues as well as generators of operating costs. We introduce a flexible stochastic model of retail store sales, estimated from store-specific historical data, that can account for the impact of all known sales drivers, including the number of scheduled staff, and provide an accurate sales forecast at a high intra-day resolution. We also present solution techniques based on mixed-integer (MIP) and constraint programming (CP) to efficiently solve the complex mixed integer non-linear scheduling (MINLP) problem with a profit-maximization objective. The proposed approach allows solving full weekly schedules to optimality, or near-optimality with a very small gap. On a case-study with a medium-sized retail chain, this integrated forecasting–scheduling methodology yields significant projected net profit increases on the order of 2–3% compared to baseline schedules. |
| |
Keywords: | Shift scheduling Constraint programming Mixed integer programming Statistical forecasting Retail |
本文献已被 ScienceDirect 等数据库收录! |
|