Complex Product Of The Critical Chain Multi-project Planning And Scheduling

With the global economy developing and production technology updatingcontinuously, for the manufacturing companies, every factory is faced with the globalmarket competition which is continuous variable and can not be fully predicted. Facingwith these challenges, most enterprises will gradually embark on many varieties and smallbatch production. At the same time, taking into account the efficiency and flexibility formany varieties and small batch production, cell manufacturing production comes into being.Critical Chain Project Management (Critical Chain Project Management, of CCPM) is anew, revolutionary way of thinking can effectively shorten the construction period, increasethe ability of projects to meet schedule and budget constraints. The CCPM First accordingto the technical constraints of the project activities (processes) to make the project networkdiagram, and then consider the project activities by resource constraints (such as labor,construction machinery, etc.), make the necessary adjustments to get the initial progress ofthe project network diagram sustained the longest line is the project’s critical chain (Criticalchain)(the Initial schedule) Scheme, the initial schedule, the last to halve the duration of allproject activities (processes), in accordance with a particular method of calculating savetime in the form of buffer added to the schedule. Practice has proved that the critical chainproject management for the entire system to increase resource utilization, reduce in-processinventory, reducing the movement of materials costs, increase productivity, increase systemflexibility and other advantages.In-depth analysis of complex manufacturing status quo on the basis of details of thekey technologies in the process of multi-project planning and scheduling of complexproducts-complex products and manufacturing engineering work breakdown structuretheory. In the case of serial and parallel the many varieties of small batch production ofmixed flow conditions, the timely supply of the considered bottleneck resource, thebottleneck machine processing capacity of the bottleneck machine utilization and schedulerequirements, multi-project resource conflicts coordination mechanism, based on key chainmulti-project program management model, to overcome the problems of the previousmodel to consider the human factor is less, and the balance redistribution andreorganization of the machines and workers in the multi-period production planning. Largemanufacturing business equipment and inconvenient features, then they consider thetransferability of the bottleneck resources, and possible problems in the production process,multi-project scheduling method based on the key chain was established based on multi-thescheduling model of the item performance indicators and the use of genetic algorithms tosolve, in order to ensure good operating results.In order to validate the multi-project planning and scheduling model based on the keychain in the complex manufacturing enterprises, a shipbuilding company currentlyproduces the specific problems in the manufacturing management were described in detailin accordance with the model presented in the paper plans to determine and scheduling toimprove, and contrast to improve the effect before and after the results show the feasibility and effectiveness of the proposed improvement program.