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Improving the cycle time of wafer fabs
FabTime® works by taking a continuous feed of operational transactions from the factory execution system, and processing these transactions in real-time for storage in a database. Outputs (including charts and tables) can be viewed using a standard web browser across a corporate Intranet. Our standard fab management charts include WIP, moves, lot age, WIP turns, per-visit cycle times, factory cycle times, tool states, tool OEE, scrap, holds, and much more.
Best of all, you don’t have to build these charts on your own after installing the system.
View your recent bottlenecks by using the Tool State Pareto Chart, sliced by tool group (as shown), or by tool. Your logged tool states are mapped, by site, to the SEMI E10 standard states. FabTime also breaks down tool idle time according to whether or not WIP was available that could have been run at that time. Use this chart to identify capacity bottlenecks and to understand tools that contribute to cycle time problems.
View your recent shipments by day (or shift, or week, as you choose), stacked by whatever variable you choose. In this example, shipments are shown by day over a two-week period and stacked by product. You can view data values right on the chart, as shown, view them on top of the bars only, or leave them to display only in a corresponding data table. You decide.
A core chart used in most wafer fabs is the Moves Trend Chart. This chart shows total fab moves by time period relative to a goal, as well as total WIP. You decide what time periods to use: hours, days, weeks, months, etc.
You can also filter this chart to:
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