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PDXBES / Rehab---nBCR-Tools

Pipe rehabilitation tracking and calculation tools
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Spot Repair - restrictions on defect type #8

Open JenniferBW opened 8 years ago

JenniferBW commented 8 years ago

Issac brought up an issue that the code as of 1/9/16 was only allowing 6 types of defect codes to go into the spot repair method. JBW asked Joe about this on 1/12/16. He set it up like this originally because those defects are the only types that were traditionally spot repaired. However, now that design can do "spot linings" other types of defects can be spot repaired. JBW and Joe agreed that we should remove the "gate" only allowing certain defect codes to be spot repaired. All defect types will be able to go through the spot repair nBCR methodology, however at the end we may flag certain types as less suitable for spot repair. Ideas/issues: Joe is concerned about CNC ("deterioration") defects showing up on many pipes and us putting those forward for spot repairs when they may not be necessary and would be better suited to lining - "non spot-repair defects" should be flagged at the end. Broken pipe moving defect (125 points) - we are not sure if that should be lined - "non line-able defects" should be flagged at the end.

yarrowm commented 8 years ago

Please clarify what you mean by "spot linings". Is this a short liner, or is this a spot repair and lining through it afterward?

Assuming that you mean to dig and repair a bad spot and lining through it afterward, how would lining after spot repair trigger the engineer to repair more spots that those critical defects on the list to trigger spot repairs?

If you mean that a "spot lining" would be a short liner to fix an isolated bad spot rather than digging, that would be a different alternative that we do not at this time consider in our tools. For one thing, the costs for lining a short bit of pipe would be different than digging up a short segment of pipe. Also, the defects that could be repaired that way would likely be different from a dig spot repair. For example, we would not line through a big hole without digging it up and repairing it first, but we might line through an isolated section of pipe that is deteriorated.

MisterGardner commented 8 years ago

This looks like a gen-4 issue. It has been partially addressed by applying linable spots to BPW calculations, and APW calculations for spot repair situations alone. This allows liners to appear generally cheaper in comparison to spot repair alternatives for large numbers of linable defects. I'm going to put a gen-4 start milestone on this, but not close it.