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8.5

Query to tell me if a piece of equipment is due for service

Asked by torttion in Microsoft Access Database, SQL Query Syntax, Access Coding/Macros

I have an access 2007 database I'm using to track my companies equipment and maintenance. I've attached a pic of the relationship view to show what it entails. I have a table, tblMaintenance where I track when equipment needs servicing. It's related to tblService_Type. TblMaintenance is set up so that it tracks an at what hour/mileage increments a unit needs servicing. So, for instance, if a piece of equipment needed it's first (PM1) scheduled maintenance at 250 hrs and it's second (PM2) at 500 and it's third at 750 (PM3)...when it went over 750 it'd need PM1 and PM3 but not PM 2. I have another table, tblAssets_Hrs_Miles where I track how many hours or miles my assets currently have, each day an entry is made with the assets ending miles or hours. I have another table that tracks when an asset is serviced, tblService_Record. I'd like to be able to run a query that tells me which assets are due for which services. I was thinking of a calculation that did the following assuming the following values:

Asset#1:
PM1 @ 250 hrs. (A)
PM2 @ 500 hrs. (B)
PM3 @ 750 hrs. (C)

Service Record
PM1 @ 256 hrs. (D)
PM1 @ 510 hrs. (E)
PM2 @ 510 hrs. (F)

Current Hours: 706 (G)

For determining if it needs PM1: IF G-E>A THEN PM1
For determining if it needs PM2: IF G-F>B THEN PM2
etc...

I don't know if this is the correct way to go about it or not and on top of that, I have no idea how to do it since I don't know sql at all. I also don't know if this is efficient since it'll have to go through each PM service type and each asset everytime it's run. Any thoughts on the best way to do this?

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Attachments:

Relationships.jpg (58 KB) (File Type Details)

Table Relationships

20091021-EE-VQP-81 - Hierarchy / EE_QW_3_20080625

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Query to tell me if a piece of equipment is due for service

Asked by torttion in Microsoft Access Database, SQL Query Syntax, Access Coding/Macros

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