Final answer:
The IDO, BSPC, and unit commander typically play roles in data collection and establishing the maximum deployment capability within an organization, such as a military installation.
Step-by-step explanation:
The entities responsible for data collection and determining the maximum simultaneous deployment capability of the installation include various roles which may be defined by the specific context or organization. Typically, an IDO (Installation Deployment Officer) oversees coordination and implementation of deployment operations including data collection, plan execution, and providing support to ensure the deployment process is effective and efficient. A BSPC (Base Support Plan Coordinator) might be involved in the planning and support aspects, as they are tasked with ensuring that logistical and resource aspects of base operations are effectively managed. The unit commander has the ultimate responsibility for the readiness and deployment capabilities of their respective unit, including overseeing the gathering of necessary data and ensuring maximum deployment capabilities. However, without a clear context of the acronyms in the original question, this answer is based on common military or organizational structures where these roles might exist.