现代物流与供应链管理 (19).ppt

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1、Chapter 10 Modelling and Simulation10.1 Modelling10.2 Flexsim simulation software10.2 Flexsim simulation softwareFlexsim is a powerful analysis tool that helps engineers and planners make intelligent decisions in the design and operation of a system.With Flexsim,you can build a 3-dimensional compute

2、r model of a real-life system,then study that system in either a shorter time frame or for less cost than with the actual system.10.2 Flexsim simulation softwareAs a“what-if”analysis tool,Flexsim provides quantitative feedback on a number of proposed solutions to help you quickly narrow in on the op

3、timum solution.With Flexsims realistic graphical animation and extensive performance reports,you can identify problems and evaluate alternative solutions in a short amount of time.By using Flexsim to model a system before it is built,or to test operating policies before they are actually implemented

4、,you will avoid many of the pitfalls that are often encountered in the startup of a new system.Improvements that previously took you months or years of trial-and-error experimentation to achieve can now be attained in a matter of days and hours using Flexsim.10.2 Flexsim simulation softwareThere are

5、 three basic problems which can all be solved with Flexsim:1.Service problems the need to 1.Service problems the need to process customers and their process customers and their requests at the highest level of requests at the highest level of satisfaction for the lowest satisfaction for the lowest p

6、ossible cost.possible cost.2.Manufacturing problems the 2.Manufacturing problems the need to make the right product at need to make the right product at the right time for the lowest the right time for the lowest possible cost.possible cost.10.2 Flexsim simulation softwareThere are three basic probl

7、ems which can all be solved with Flexsim:3.Logistic problems the need 3.Logistic problems the need to get the right product to the to get the right product to the right place at the right time for right place at the right time for the lowest possible cost.the lowest possible cost.10.2 Flexsim simula

8、tion softwareFlexsim has been used successfully in both system design studies and in the managing of systems on a day-to-day operational basis.Flexsim has also been used for training and education purposes.10.2 Flexsim simulation softwareA Flexsim training model can provide insight into the complex

9、dependencies and dynamics of a real-life system.It can help operators and management not only learn how a system operates,but learn what happens when alternative procedures are implemented.Flexsim has been used to build interactive models which can be manipulated while the model is running in order

10、to help teach and demonstrate the cause and effects inherent in system management.10.2 Flexsim simulation softwareBefore we start,it will be helpful to understand some of the basic terminology of the Flexsim software,and how this terminology applies to general simulation concepts.10.2 Flexsim simula

11、tion softwareFlexsim objects simulate different types of resources in the simulation.An example is the Queue object,which acts as a storage or buffer area.The Queue can represent a line of people,a queue of idle processes on a CPU,a storage area on the floor of a factory,or a queue of waiting calls

12、at a customer service center.Flexsim objects10.2 Flexsim simulation softwareAnother example of a Flexsim object is the Processor object,which simulates a delay or processing time.This object can represent a machine in a factory,a bank teller servicing a customer,etc.Flexsim objects10.2 Flexsim simul

13、ation softwareFlowitems are the objects that move through your model.Flowitems can represent parts,pallets,assemblies,paper,containers,people,telephone calls,orders,or anything that moves through the process you are simulating.Flowitems can have processes performed on them and can be carried through

14、 the model by material handling resources.In Flexsim,flowitems are generated by a Source object.Once flowitems have passed through the model,they are sent to a Sink object.Flowitems10.2 Flexsim simulation softwareThe itemtype is a label that is placed on the flowitem that could represent a barcode n

15、umber,product type,or part number.Flexsim is set up to use the itemtype as a reference in routing flowitems.Itemtype10.2 Flexsim simulation softwareEvery Flexsim object has an unlimited number of ports through which they communicate with other objects.There are three types of ports:input,output,and

16、central.Ports10.2 Flexsim simulation softwareInput and output ports are used in the routing of flowitems.For example,a mail sorter places packages on one of several conveyors depending on the destination of the package.To simulate this in Flexsim,you would connect the output ports of a Processor obj

17、ect to the input ports of several Conveyor objects,meaning once the Processor has finished processing the flowitem,it sends it to a conveyor.10.2 Flexsim simulation softwareCentral ports are used to create references from one object to another.A common use for central ports is for referencing mobile

18、 objects such as operators,fork lifts,and cranes from fixed resources such as machines,queues,or conveyors.10.2 Flexsim simulation softwareThe“Q”for input and output ports and the“W”key for central ports.The following table shows the keyboard letters used to make and break the two types of port conn

19、ections.Output-Input CenterDisconnectQWConnectAS10.2 Flexsim simulation softwareObject library10.2 Flexsim simulation softwareSimulation ProcedureSet up the layout of the simulation model.10.2 Flexsim simulation softwareSimulation ProcedureComplete the simulation model.10.2 Flexsim simulation softwa

20、reSimulation ProcedureDefine the parameters the simulation model.10.2 Flexsim simulation softwareSimulation ProcedureDefine the parameters of the simulation model.10.2 Flexsim simulation softwareSimulation ProcedureRun the simulation model,and analysis the simulation results.10.2 Flexsim simulation softwareThank you!10.2 Flexsim simulation software