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To browse Academia. Wight, J. Orlicky and W. Nevertheless, the MRP-II concepts are based on the waterfall model which encloses several weak points like: - Hierarchical and sequential planning procedure without direct recursive functions - Gross-Net-Method for material require-ment planning and order calculation centered on inventory - Time-phasing of depended required material using the Bill-of-Material BoM A new MRP concept can avoid these weak points by using the capabilities of Industry 4.
Here a new MRP-Concept is presented based on the Digital Control Twin DCT and the main functions are explained like: - Synchronous planning and order calculation of final products and required components - Actual-Target-Method for material requirement planning - Time-phasing of material requirements by production and material flow structure - Rule-based material requirements planning - Use of actual process data for proactive regulation - flexible choice of appropriate tools and algorithm depending on the actual data.
Material requirement planning MRP is a key element in managing resources in a manufacturing environment. MRP systems were developed to help companies manage dependent demand inventory and schedule replenishment orders. MRP systems have proven to be beneficial to many companies. This paper presents a new framework for manufacturing planning and control systems which we call iterative manufacturing planning in continuous time IMPICT that appears to have several advantages over the well-known material requirements planning MRP framework.
IMPICT explicitly considers capacity constraints and total system cost including tardiness to determine order sizes, order releaseldue dates, and operation schedules in a deterministic, multi-level, finite horizon, dynamic demand environment. Continuous time scheduling variables allow setups to be carried over from one period to the next. Material requirement planning is an essential activity in a manufacturing organisation to ensure that right quantity of materials are available at the right time and the inventories are not excessive.
