Joomla application tracking component

It will be for tracking application forms. Every application must be tracked between 5 stages before to be approved or not. Stages are not necesary correlative, I mean.. application can downgrade from stage 4 to 2. Every stage upgrade or downgrade must have predefined names (stage change, question to applicant, response from applicant) and a field for notes about stage changes. Every stage change must be loged on the application judgment log. Only admin user will can post to the log and frontend user must be readonly for viewing the log of their applications. Applicants must log in to a private area to see their application judgment status. Applicants table must be created because every applicant can have more than 1 application at the same time. The final stage will be for telling applicant if application made was aproved or not.