Organizational Process Assets (OPA) and Enterprise Environmental factor (EEF) are input to many of processes of Project Management.
OPA are Organization’s process, procedures and knowledge base which helps to ensure project success. OPA can be divided into two parts.
Knowledge Base: Every organization has their own knowledge base of Lesson learn, financial database such as labor rates, travel rates, project files, defect history, productivity table etc.
Processes/Procedures: This includes organization standardized processes (related to travel, visa, IT helpdesk etc.), guidelines, templates, organization project management methodologies, project life cycle etc.
Enterprise Environmental factors are surrounding of performing organization. It includes Internal and External factors. Internal factors include Organization style, Organization culture, Organization policies, Organization existing staffs etc. External factors include Market environment, exchange rates, prevailing interest rates, Government policies, regulatory, availabilities of skill resources.
On a general level you can think of OPA as something which is there to help and ensure project success and EEF as something which provides constraint or limitation to the project.
You can visualize "Project's" to operate under "Organizational Process Assets (OPA)" and performing organization OPA’s to operate under "Enterprise environmental factor".
