In a previous blog post I documented simmer in R for discrete-event simulation. In this post I want to provide a more hands-on practical example. It is a very simple example, to be honest. Regardless of this, and regardless of […]
In previous articles, I modeled and solved a single machine scheduling problem. What if we have two resources that operate in a pre-determined sequence (but not in parallel) to process a set of similar jobs? The so-called “flow shop” scheduling […]
Thanks to the evolution of Python and its applications to solve linear programs and their variations supply chain and operations research analysts now have access to numerous packages and tools that support decision making. In this article I will use […]
This is a very high level post, really a marketing post, to inform you about a brand new discrete-event simulation capability within the AutoCAD environment. The capability comes in the form of an AutoCAD Plug-in called ProModel AutoCAD Edition, developed […]
In SAP PP, a production version maps BOM with routing. A production version is created for a material, from the MRP 4 view of the material master. There can be multiple production versions for a material. A validity period must […]
In SAP routings the purpose of component assignment is to avoid excess buffer inventory. By default, all components are assigned to the first operation in a routing. In reality, however, most components might only be required much later in the […]
In SAP PP, sequences are combinations of operations used for describing and modelling production processes. In SAP PP, a sequence overview can be accessed from the routing header. Use TC CA02 to display the routing. In the routing, click the […]
Routing structure A routing is plant specific, but a routing can comprise or reference operations from other plants, and vice versa – as long as both plants belong to the same controlling area. Task list groups You can create task […]
What is a routing? A routing is a type of master data It describes how certain inputs (e.g. material) are transformed into a certain output (e.g. material), through defined operations A routing also defines the work centers and PRTs (production […]
In SAP PP, work centers can be subordinated into a hierarchy structure. A work center can be part of several hierarchies. A hierarchy can comprise work centers from several plants. Hierarchies are e.g. used to aggregate capacity requirements data. Statistical […]
What is a cost center? A cost center is an organizational sub-unit that incurs costs Its purpose is to enable a transparent overview of costs by organizational and functional criteria A cost center is defined having either responsibilities, spatial areas […]
What is a work center in SAP? Can be a machine, tool, device, person or a group of these Is a spatial area within the work system of an enterprise Is an area where operations are executed Used for defining […]
A BOM consists of a header production to which items are specified as components and subassemblies in the body of the BOM. Each item is assigned type, quantity and unit type. For each item it can be specified whether the […]
Basic information on the material master in SAP: Has relationships to many other data Characterizes input, intermediate and output goods Used in both production and trade Has a unique material number Material is created using transaction MM01 Production version is […]
The assignment problem is a classic problem in linear program. If, for example, you have n jobs that need to be manufactured during the upcoming shift (in a manufacturing plant) and you have m machines to produce these tasks, then you want […]
