A  is the minimum number of  that a process has to obtain in order to be allowed access to the shared resource.

The minimum number of resources that a process must obtain to access a shared resource typically refers to the concept of "resource allocation" in computer science, particularly in the context of operating systems and concurrent programming.

1. Definition: In a concurrent system, multiple processes may need access to shared resources (e.g., memory, files, devices). To prevent conflicts and ensure data integrity, a process must acquire a minimum number of resources.

2. Resource Allocation Graph: In resource allocation, we often analyze the situation using a Resource Allocation Graph, which illustrates the allocation of resources to various processes.

3. Deadlock Consideration: The minimum number of resources required by a process can also play a crucial role in avoiding deadlocks. Deadlock occurs when processes are waiting for resources that another process holds, creating a cycle of dependency.

4. General Rule: Typically, a process may need at least one resource to carry out its tasks. However, if multiple processes are competing for the same resources, additional resources may be necessary to ensure smooth operation without deadlocks.

5. Practical Example: For instance, if two processes each require two instances of a resource to proceed, but only two instances are available, the minimum for either process to proceed is actually three instances. This means at least one additional resource must be held by one of the processes to avoid deadlock.

In summary, the minimum number of resources a process must obtain to access a shared resource can vary depending on the specific context, the number of competing processes, and the resource requirements of each process. Efficient management is crucial to ensure system stability and avoid issues like deadlocks.