Certain organizations engaged in HRM activities, take up the process of registration of personnel for recruitment. They keep a reserve or inventory of manpower and supply the same to organizations which need manpower at random times points. The reserve of manpower cannot be beyond a certain limit called the threshold, because it would be expensive and also has impact on the goodwill of the recruiting organization. Hence they stop the registration for recruitment as and when the threshold is reached. An additional manpower stock is also maintained to meet the situations which arise due to the fact that some of the persons who have registered for recruitment may not turn up at the time of demand. Hence the threshold can be represented as a total of two components. Using the shock model and cumulative damage process concept the expected time to stop registration and its variance are derived in this paper. Numerical illustration is also provided.