Hello Nitin,
Please Follow steps for the same.
1.Create a custom table to store lookup data.The custom table must extend the Data Lookup Matcher Rules [dl_matcher] table.
a. In the navigation filter, enter the name of the new custom lookup table.
b. Create New fields with proper choice list(Impact, urgency and priprity).
c. From the table list,click New and enter appropriate matcher and setter field values.
For Example:
| Impact | Urgency | Priority |
| 1 - High | 1 - High | 1 - Critical |
| 1 - High | 2 - Medium | 2 - High |
| 1 - High | 3 - Low | 3 - Moderate |
| 2 - Medium | 1 - High | 2 - High |
| 2 - Medium | 2 - Medium | 3 - Moderate |
| 2 - Medium | 3 - Low | 4 - Low |
| 3 - Low | 1 - High | 3 - Moderate |
| 3 - Low | 2 - Medium | 4 - Low |
| 3 - Low | 3 - Low | 5 - Planning |
2.Create a data lookup definition record for matcher and setter.
a. Navigate to System Policy > Rules > Data Lookup Definitions and Click New.
b. Click Data Lookup Rule.
c. Complete the Data Lookup Rule form and and click Save.
d. From the Matcher Field Definitions related list, click New.
e. Complete the Matcher Field Definitions form and Click Submit.
f. From the Setter Field Definitions related list, click New.
g. Complete the Setter Field Definitions form and submit.
Hit Helpful or Correct on the impact of response.
-Tushar
