Final answer:
The statement that decision-support systems are primarily used by operations management is false; they are used across various management levels, and Dillon's Rule actually limits the freedom of local governments, contrary to what the statement suggests.
Step-by-step explanation:
The assertion that decision-support systems are most commonly used by the operations management level of an organization is false. Decision-support systems (DSS) are designed to assist all levels of management in decision-making processes. They are particularly used at the tactical and strategic levels where complex analysis, modeling, and evaluation of data are necessary to answer intricate and non-routine questions. Such systems are conducive to the decision-making of managers who are responsible for planning and problem-solving in the long-term strategic interests of the company, though they can also be adapted for use at an operational level depending on the specific needs of the organization.
On the other hand, Dillon's Rule concerns the authority given to local governments. It states that a municipal government has authority only if such authority is explicitly granted by the state government or can be clearly inferred from such grants.