Final answer:
A point-scoring system within the context of systems studies is commonly used to rank competing systems when purchasing a system. It provides a means of comparing and ranking sources by assigning points for desirable criteria and deducting points for undesirable ones.
Step-by-step explanation:
A point-scoring system within the context of systems studies is commonly used for c) ranking competing systems when purchasing a system. This system assigns a score to different systems or options based on predetermined criteria. It provides a means of comparing and ranking sources by assigning points for desirable criteria and deducting points for undesirable ones.