The report builder should allow enabling a report to be set as a KPI and adding a target value. Additionally, there should be an option to define whether the KPI is of type "time" or "quality".

  "targetValue": {
    "countChart": {
      "isBelow": false,
      "value": "100"
    },
    "durationProgress": {
      "baseline": {
        "unit": "hours",
        "value": "0"
      },
      "target": {
        "unit": "hours",
        "value": "2"
      }
    },
    "active": false,
    "countProgress": {
      "baseline": "0",
      "target": "100"
    },
    "durationChart": {
      "unit": "hours",
      "isBelow": false,
      "value": "2"
    }
	"isKpi": "true"
	}, 

ATs:

• Reports can be set as KPI reports.
• Only number reports can be set as KPI reports.
• It can be set as above or below target.
• It can be a quality or time KPI.
• It can be a KPI if it has a single definition or multiple definitions
• Existing reports which arent KPI reports work as expected
• API documentation has been updated
• Import/ export of reports should be tested and potentially document the change
• There are ITs to verify this behavior.