An agency pipeline number is usually three numbers wearing one coat
Ask an agency founder what is in the pipeline and you will get a single figure. Inside it are three quite different things. Retainer fees, which recur and are the basis on which anybody can be hired. Project fees, which arrive once and then stop. And pass-through value, meaning media or production budgets the agency handles and earns a margin on, which can dominate the total while contributing modestly to what the agency actually earns.
Blending them produces a number that cannot be used for any decision. A pipeline dominated by one large media budget looks healthy while recurring fees are flat, which is a business quietly shrinking. Splitting the three, and forecasting each separately, is the first change to make and it costs nothing but a field.