Currently, the approval expiration date can only be configured via parameterization at the work item/page level.
We want to extend this capability by allowing configuration of expiration settings at three levels:

1. Global

2. Definition

3. Page (existing)

At page level the following options should be available:

• Expires in – duration in the format: X HOUR / DAY / WEEK / MONTH / YEAR

• Expires at – specific date and time (keep current format)

New parameter behavior options (for Global and Definition levels):

• Optional – lower levels can override or ignore the setting

• Required – lower levels must define a value

• Custom – lower levels must define a value within a limit, with same format as defined for "Expires in"

Default expiration:

• A default expiration value should be configurable at the Global and Definition level (default: 1 WEEK)

• If Custom is selected, the default must be less than or equal to the configured max value

• Default value will be used at lower levels can be changed there

• If Global = Required, the Definition level must define expiration (cannot be Optional this option is disabled)

• If any higher level ≠ Optional, the page level must provide a value (it cannot be unset)

• When triggering approval via the "Start" button, the expiration with the default value is used