Browsing by Subject "flexible manufacturing systems"

Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    Experimental investigation of an FMS due-date scheduling problem: Evaluation of machine and AGV scheduling rules
    (Kluwer Academic Publishers, 1993) Sabuncuoglu I.; Hommertzheim, D.L.
    Although extensive research has been conducted to solve design and operational problems of automated manufacturing systems, many of the problems still remain unsolved. This article investigates the scheduling problems of flexible manufacturing systems (FMSs). Specifically, the relative performances of machine and automated guided vehicle (AGV) scheduling rules are analyzed against various due-date criteria. First, the relevant literature is briefly reviewed, and then the rules are tested under different experimental conditions by using a simulation model of an FMS. The sensitivity to AGV workload, buffer capacity, and processing-time distribution is also investigated to assess the robustness of the scheduling rules. © 1993 Kluwer Academic Publishers.
  • Thumbnail Image
    ItemOpen Access
    Multiple part-type scheduling in flexible robotic cells
    (2009) Batur, Gül Didem
    This thesis considers the scheduling problem arising in two-machine manufacturing cells which repeatedly produce a set of multiple part-types, and where transportation of the parts between the machines is performed by a robot. The cycle time of the cell depends on the robot move sequence as well as the processing times of the parts on the machines. For highly flexible CNC machines, the processing times can be adjusted. As a result, this study tries to find the robot move sequence as well as the processing times of the parts on each machine that minimize the cycle time. The problem of determining the best cycle in a 2- machine cell is first modeled as a travelling salesman problem. Then, an efficient 2-stage heuristic algorithm is constructed and compared with the most common heuristic approach of Longest Processing Time.