The concept of "midcourse corrections" can be described as making adjustments or alterations to a plan or course of action while it is still in progress. Antonyms for this phrase could include terms such as "inflexibility," "rigidity," or "stubbornness." When someone is unwilling or incapable of adapting their plans based on changing circumstances, they may be described as being "set in their ways." Alternatively, antonyms could include words such as "preemptive" or "proactive," which imply that one is able to anticipate potential issues and take action before they become a significant problem. Ultimately, the antonyms for "midcourse corrections" reflect an inability or unwillingness to be flexible, adaptable or proactive towards achieving successful outcomes.