A method, apparatus and computer product for installing and testing an application on a highly utilized computer platform comprising: determining spare computing capacity of the computer platform over a utilization period; determining workload capacity required by the computer platform for installing the computer application and performing one or more diagnostic tests on the installed computer application; and scheduling deployment and performance of the one or more diagnostic tests to avoid periods where there is low computing capacity based on a predicted recurrence of the spare computing capacity over a similar future utilization period whereby the scheduling aims to provide sufficient system capacity for running an accumulated extra workload of the new application and the additional diagnostic tests required to verify the deployment of the one or more diagnostic tests.