Define Anomaly Thresholds
- Security:Modelpermission.
With
Anomaly Detection
, standard sheets highlight anomalies that fall outside the 40% thresholds of the data in your prediction version. Building an AIML-THRESHOLD modeled sheet enables you to define the thresholds globally or for each combination of version, level, and account. Example: You can set a threshold of 20%.The system default for thresholds is 40% for any combination of levels, versions, and accounts. The more specific thresholds you define override more general thresholds. Example: You define 20% as the upper and lower thresholds for all accounts, versions, and levels. You define a 10% threshold for the Salary account. The 10% threshold applies to all versions and levels for the Salary account, overriding the 20% defined in the previous row of the sheet.
When you add a row defining a combination of levels, versions, and accounts that has already been defined, the machine uses the latest definition, or the one closest to the bottom of the sheet. When you leave a cell blank in a row, the machine ignores the entire row.
- SelectModelingfrom the main menu.
- ClickLevel Assigned Sheets.
- ClickNew Sheet.
- As you complete the form, consider:
Option Description NameIn all caps, enter exactly:AIML-THRESHOLD.Create new sheetSelectModeled and Blank modeled sheet (advanced).Sheet codeEnter any code. - ClickNext.
- ClickColumn and Levelsfrom the sheet summary.
- Select theLevelscolumn already in the canvas.
- In the settings, click the check box of only 1 leaf level, which is a level that has no child levels.Do not select any other levels.This is the level you're assigning the sheet to.
- From theElementstab, expandData Entry Columns.
- Drag and dropTextinto the canvas 3 times separate times.
- For theNameandCodeof eachTextelement, enterad_versionfor the first 1,ad_levelfor the second 1, andad_accountfor the last 1.
- Drag and dropNumberinto the canvas 2 times.
- For the settings of eachNumberelement, consider:
Option Description NameEnterUpperfor 1 of theNumberelements, andLowerfor the other.CodeEnterupperfor 1 of theNumberelements, andlowerfor the other.Display AsSelectNumberfor both.Decimal PlacesSelect0for both. - ClickSave.
- SelectSheetsfrom the main menu.
- From theLevelsprompt, select the leaf level you added to the sheet.
- From the version prompt, select your default version.Your default version is bold.
- To open the sheet, click AIML-THRESHOLD.
- From the sheet toolbar, click theAdd Rowbutton.
- In thead_level,ad_account, andad_versioncolumns, enterAllor the exact codes of the levels and accounts, and the exact name of versions. Entering a specific version, a specific level, and All for accounts defines the threshold for all accounts in that level and version.Example: EnteringAllin all columns defines the same threshold for all accounts, levels, and versions.Capitalize and spell correctly because the machine ignores the names and codes it can't recognize.
- In theUpperandLowercolumns, enter a whole number.Example: Entering10inUpperdefines the threshold as any value that is more than 10% greater than the prediction.