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MathWorks
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re: Plan strategies for adopting Model-Based Design for embedded applications: Part 4—Migration plan; implementation, verification, and validation
MathWorks   4/28/2011 5:26:40 PM
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Greetings DAB, Skepticism is a useful attitude when evaluating claims of transformational approaches to engineering development. I have wandered down a number of what turned out to be blind alleys in my career. However, based both on my personal experience and those of multiple companies that have adopted Model Based Design, I can assure you that the hype in this case is fully justified. During my career at Caterpillar Inc, I lead a group that was responsible for machine and engine control system development and was charged with the responsibility of improving both the process and tools used for controls development. After considering a number of development methods to improve our capability to develop control systems I selected Model Based Design and the MathWorks toolset. Our initial efforts were focused on Rapid Prototyping. In these applications we achieved a 70% reduction in the time to first working prototype. Based on this success we began a move to utilize automatic code generation in production applications. This was not, for us, a quick transition but rather occurred in stages over a period of time. The ultimate result was a complete adoption of automatic code generation for all machine and engine applications across the corporation. Savings exceeding 50% were achieved on large complex applications. This success has been achieved by many companies of different sizes and with widely varying applications. The MathWorks website ( www.mathworks.com) contains many case studies that testify to the advantages that have been realized. While I encourage you to retain your skepticism when encountering claims of transformational development approaches, I encourage you to give Model Based Design consideration. The rewards will exceed your expectations. Best Wishes for future success, Larry Kendrick

EREBUS0
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re: Plan strategies for adopting Model-Based Design for embedded applications: Part 4—Migration plan; implementation, verification, and validation
EREBUS0   4/22/2011 7:27:33 PM
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I have heard this same story for the last thirty years. Promises, Promises, but nothing useful. If you believe this approach will really work, hold a contest. Use a simple set of requirements for a basic system. Have a group of engineers use their methods, you use your fancy tools. When either side gets a finished design you stop. If the design meets the requirements it wins. Then you let the others finish to see how much longer it takes. You compare the % of requirements implemented correctly on the first version, count the number of errors/mistakes/screw ups and then you do a comparision chart. When your tools can create a working system with maintainable code, meets requirements, gets the job done faster with less resources, then you have a practical approach. Stop wasteing everyones time telling us it can be done, DO IT, then I will be interested. Otherwise it is just another worthless academic exercise. Thanks DAB



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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