Abstract
Collaborative Knowledge Management System (CKMS) is a system that has been used by members of Cloud Service Provider (CSP) as a place to manage and facilitate the information technology (IT) as a service (ITaaS) environment which is related to knowledge as a service (KaaS) in providing supplier and the recipient or demander for a specific application of tasks or services based on its allocating and agreement in cloud computing. In this context, there are many parties who are very concerning about it, but unfortunately there is lacking of a common of ITaaS of best practice as a guideline that can be used by CSP to make use collaboratively for the future purposes in engaging with services in the cloud computing environment. Therefore, this paper discusses the model of ITaaS in order to ensure everybody who are providing and receiving the services in the cloud satisfied and getting the best maximum return of the investment in allocating and sharing resources among the providers and recipients in cloud computing environment.