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    Scheduling and Rostering of Temporary Staff to Deal with Periodically Increasing Demand in Retail Sector: An Application
    (Gazi Univ, 2022) Curebal, Ahmet; Koctepe, Serkan; Eren, Tamer; Ozder, Emir Huseyin
    Temporary employment is a need to meet periodically increasing demand. It is arranged for a limited number of days and its service quality output is observed instantly. These make the planning phase complicated. In the process, the priority of businesses is to meet the increasing demand and to regulate the workload according to the terms of the period. Solving the periodic increase in demand by providing permanent employment can cause businesses to face the costs arising from excess employment in the long term. Generally, businesses manage these periods by hiring new staff. The most critical problems of the process are the suitability of the temporarily employed staff to work and whether they are suitable for the competencies in the job description. It is expected to achieve an efficiency equivalent to the cost to be incurred for this need that occurs in certain time periods. Adaptation processes, the effects of today's pandemic virus, and ergonomics issues owing to some tasks are the other basic constraints of this planning process. In this study, the problem of scheduling and rostering of staff requested for the problem of staff shortage owing to periodically increased demand has been solved. 50 candidate staff were evaluated in 4 competency types. Thus, an optimized service quality and staff costs has been achieved for this periodic staff need. For problem solving, 0-1 integer programming model was established and the proposed model, is written in ILOG CPLEX Studio IDE and is solved with the CPLEX solvent.
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    Staff Scheduling Problem for Advertising Fuel Stations Using Goal Programming Method
    (Gazi Univ, 2022) Eren, Tamer; Koctepe, Serkan; Cürebal, Ahmet
    With the growth of the economy in recent years, competition has increased in almost every sector. With the increase of competition, companies get services to organize various organizations in addition to traditional advertisements in order to increase their recognition. Promotion organizations have become a growing sector today. According to the data of a private research company working on this sector, in Turkey, every year more than 36,000 professional and industry organizations are held and budget has reached $4 billion. In organizational planning, it is observed that a large part of the budget is allocated to personnel expenses. In addition, any disruption during the service can cause irreversible negative consequences for the company compared to other sectors. For this reason, it is very important to select qualified personnel and assign them to the right job. Therefore, with a staff work plan using scientific methods, costs can be minimized and service quality can be increased. In this study, the assignment and scheduling problem of 40 personnel who will serve 10 different stations has been solved with the goal programming model. IBM Ilog Cplex Optimization Studio program was used to solve the problem.