Assessment practices and requirements are very broad and vary widely among academic programs and from one institution to the other. Consequently, we noticed, in the recent years, increased volumes of research and interest geared into the assessment process and procedures in various disciplines in higher education. In this paper, we present and explain a model for long term assessment and a set of robust tools and techniques within the framework of process steps, team work, and task-driven process management. Using this presented assessment methodology, we have been successful in our accreditation efforts, and improved the quality of our programs. This model can be used for long-term assessment with several years of task scheduling and assessment timeline. We share our views and thoughts in the form of lessons learned and best practices so as to streamline the process of assessment and simplify its procedures and steps.