When managers use a management information system, no management action is needed if?

False

Explanation:

Management information systems (MIS) are very useful tools that managers can use to obtain information from internal and external sources. The advantage of using management information systems is that they can convert a lot of data into useful information and us it in decision making processes.

But MIS are just one more tool that managers can use, it doesn't replace managers and it doesn't make decisions by itself, its main purpose is to provide useful information that managers can use.