Data Dictionary
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FPSBASE Views
> FPSBASE.WIP_WAFER_HIST_LOOP
View FPSBASE.CHK_LOTS_IN_TABLES
All active lots should be in WIP_LOTS_STATIC, WIP_LOTS_VERIFY, and WIP_EVENTS_CURR_STEP. Lots should not be in one or two of these tables rather only all three or none. In addition, those lots which are not TW and not in bank should be in WIP_STEP_FUTURE. This view checks all of these and reports where we have problems.
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Column |
Comment |
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TAB_LIST |
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IS_TW |
Our standard filter to exclude test wafers is is_tw = N but what we really mean with this filter is to exclude any lots that do not add value for the facility. Lots which add value including sellable, development, and engineering and these lot groups should have is_tw set to N. Lots which do not add value are commonly grouped together and named "test wafers" which is why this flag is named is_tw. These include true test wafers like monitors and quals and dummies but also could include virtual lots used for training or testing, bare wafers, or really anything else including in the MES as a lot which does not add value. All of these lot groups should have is_tw set to Y. You could argue that the is_tw field might be more accurately named is_value or is_valuable or is_prod_eng_dev but is_tw is generally clear to most people. Plus it has the advantage that it is short which is nice given how frequently we use the is_tw = N filter. (* inherited from FPSINPUT.WIP_LOT_GROUPS) |
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IS_BANK |
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N |
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PROBLEM |