[转载] Flexsim 和 ExtendSim 特点对比 （中立）

iesim

[转载]
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We have both products. They are products that are to a certain degree complementary.

We use FlexSim for visualization on complex, closely coupled systems where part location and orientation is critical. It's built in Graphing is better. On the other hand, in a dynamic facility design and equipment layout environment, it takes an enormous amount of effort to convert equipment drawings from CAD systems like ProEngineer into a compact fast format (VRML). If you have weekly updates to equipment drawings rendering those to VRML for multiple Level of detail can take alot of time. Modeling for external customers with no simulation experience can be more persuasive, unless of course they fixate on visual details which do not affect system performance. For example you select a forklift from a standard library of images, but the real system uses one with a different fork configuration. The 3D engine and animation are obviously more mature in Flexsim, but ExtendSim's use of the Torque game engine seems to provide room for future growth. Moving 3D Graphics to ExtendSim requires non-bundled software.

ExtendSim is used for modeling systems with lots of items, where some items you want to see moving in the animation and others need not be animated. ExtendSim's integrated relational database is also a very fast (much faster than ODBC) way to create, access, and write data during a model run. Many of our ExtendSim models have hundreds of database tables and thousands of items so having the database is a key feature. If you build models for statistical studies, 3D visualization really doesn't provide any significant benefit, because if your running 40 replications of a model that takes 30 minutes to run you wouldn't really watch the runs execute. The open block code make customizing functions or writing database enabled blocks simple. In our experience, model development seems to go faster on ExtendSim. Once we have the equipment quantity and buffer sizing we can fine tune it in a Flexsim model.

Hope this helps,
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Henry B.

iesim

extendsim 不但有odbc 数据库接口，同时内部也有一个可以与模型一起载入内存的关系数据库，这样在处理大规模数据的时候，模型运算速度更快，并且可以更方便的支持结构和数据分开的理念。