"In this paper, the authors solve the problem of maximizing reliability of heterogeneous distributed computing system where random node can fail permanently. The reliability of the system can be achieved by executing all the tasks queued on its node before they all fail. As the mobile network is defined as a dense collection of mobile entities connected by a wireless link, without any administration or fixed support. In the mobile network no central authority is present due to which the network disconnection is very frequent between the mobile nodes. A chance of errors in the mobile distributed network is very high."