Paid
PC1
= cumulative value of Paid Claims at t1
PC2
= cumulative value of Paid Claims at t2
PC1,2
= incremental value of Paid Claims over the interval from t1 to t2
Reported
RC1
= cumulative value of Reported Claims at t1
RC2
= cumulative value of Reported Claims at t2
RC1,2
= incremental value of Reported Claims over the interval from t1 to t2
Case
Case1
= the value of Case O/S at t1 (point-in-time value, neither cumulative nor incremental)
Case2
= the value of Case O/S at t2 (point-in-time value, neither cumulative nor incremental)
chg(Case)
= Case2 – Case1
Cumulative
RC1
= PC1 + Case1
Incremental
RC1,2
= PC1,2 + chg(Case)