Addison Wesley – Business Intelligence Roadmap. Addison Wesley – Engineering a compiler pdf of the Business Rule Approach.
How to Crack CD Protections. Sons – Auditing Information Systems. Security and Hacking – Anti-Hacker Tool Kit Second Edition. Wiley – Enterprise Resource Planning. Wiley – Essentials of Supply Chain Management. Unsourced material may be challenged and removed. They may also be used for changes in specifications.
In a typical system development cycle, the specification or the implementation is likely to change during engineering development or during integration of the system elements. ECOs can compensate for design errors found during debug or changes that are made to the design specification to compensate for design problems in other areas of the system design. In chip design, ECO is the process of inserting a logic change directly into the netlist after it has already been processed by an automatic tool. EDA tools are often built with incremental modes of operation to facilitate this type of ECO. After masks have been made, ECOs may be done to save money.
Designers often sprinkle a design with unused logic gates, and EDA tools have specialized commands, to make this process easier. The netlist files have to be searched for the logic affected by the change, the files need to be edited to implement the changes up and down the hierarchy, and the changes need to be tracked and verified to make sure exactly what needs to change gets changed and nothing more. This is a very time and resource-intensive process that is easily subject to errors. ECOs to ensure the revised implementation matches the revised specification. ECO routing to help with implementing physical-level ECOs. Functional ECOs, usually the most tedious process in implementing an ECO. ECO netlist based on the changed RTL.
Correction of a design error that doesn’t become evident until testing and modeling, or customer use reveals it. A change in material or manufacturing method. This can be caused by a lack of material availability, a change in vendor, or to compensate for a design error. Identification of what needs to be changed. This should include the part number and name of the component and reference to the drawings that show the component in detail or assembly. This includes a drawing of the component before and after the change. Generally, these drawings are only of the detail affected by the change.