Entitlement accrual issues - why are there no Leave Accruals for an Employee?

When reviewing an Employee Payroll it is found that they have not been Accruing Leave, either Never or the Accruals have stopped.

The Employee has never Accrued Leave

If the Employee has never Accrued Leave it is most likely that the Entitlement Accrual Pay Item has not been included in their Standard Pay

Likely Cause:
Leave will only accrue if the Accrual Pay Item is included in the employees Standard Pay AS WELL AS each Current Pay Run.

The Leave has Accrued in the past but has stopped Accruing

The Leave Balance consists of 2 components

Earned Balance

The Earned Balance Represents the Balance of Leave, excluding the Current Entitlement Period

Accrued Balance

The Leave Accrued Balance represents the Leave Accrued since the Employees LAST Entitlement Rollover Date ( this date is based in the Entitlement Period and will start on the Trigger Date entered into the Entitlement Setup.
It should be noted that the Accruals for the Entitlement Period CANNOT exceed the Entitlement for that period.
This means that there will be no accrual if the Period to Date Accrual Balance exceeds the Entitlement

Note: Generally, the Trigger Date will be the employee Start Date and the entitlement period will extend for the appropriate length of service, for example Annual Leave and Personal Leave will commonly be for a period of 12 months (or an equivalent number of Hours)

Likely Cause:
A common cause of the cessation of Accruals will be that there was an Entitlement Adjustment added as an Accrual Balance Adjustment, this in effect can cause the situation where the Period to date Accrual Balance exceeds the Entitlement Balance,