A function alias is the most appropriate and efficient Pega Platform feature for this requirement. It allows a developer to create a reusable alias for a database function, which can then be used directly within a Report Definition. To meet the requirement, a function alias can be created to calculate the difference between the current date and the customer's start date. This alias can then be used in a report column to categorize the customer's tenure into the specified time buckets (e.g., using a CASE statement within the function). The report can then be summarized by this calculated column to display the count of customers in each category, directly fulfilling the business need in a declarative, maintainable, and performant way.

B. Use a correlated subreport: A subreport is used to combine data from different classes or for complex joins, which is not required here as all data exists within the same customer context.

C. Use a Rule-Obj-ListView with a custom getContent activity: Rule-Obj-ListView is a deprecated rule type. Modern Pega applications use Report Definitions. Relying on custom activities for reporting logic is against best practices.

D. Use a Connect-SQL rule: This involves writing raw SQL, which bypasses the declarative features, security, and optimization benefits of the Pega reporting framework. It is unnecessary for this type of data bucketing.

1. Using function aliases in reports

Pega Platform 8.8 Documentation: "You can use function aliases in report definitions to provide more flexible reporting options. For example

you can use function aliases to apply an SQL function to a column of data to format or calculate the results... This approach is useful for creating custom calculations or formatting that is not available through the standard reporting features." This directly supports using a function alias for the calculation and categorization required.

2. Creating a function alias

Pega Platform 8.8 Documentation: This document details the process of creating a function alias

noting its purpose is to "make it easier for application developers to use functions in their reports." This aligns with creating a specific function for the tenure calculation.

3. About Report Definition rules

Pega Platform 8.8 Documentation: "Report definition rules generate HTML and SQL that is executed to retrieve and format the data for the report. Report definitions are the preferred rule type for creating reports in Pega Platform." This reference establishes Report Definitions as the standard tool

making the use of deprecated ListViews (Option C) or external Connect-SQL (Option D) incorrect for this standard requirement.

4. Grouping results in a report

Pega Platform 8.8 Documentation: "To better visualize and analyze your data

you can group results in a report... For example

you can group a list of employees by their office location to see how many employees work in each office." This supports the final step of summarizing the data by the calculated category column created with the function alias.