How can you ask a question that you don't know what it means?
Anyways, this is when there is one task that can be accomplished in two ways, and some team members want it done one way, the others want it done the other way.
I think this falls into the conflict management job description part of the project manager. In my opinion, the project manager has to gather the input about both ways (from different people), and decide based on the feedback he receives, which way the task should be done.
It is important that the project manager does not make the decision as a win for one camp over the other, and it is equally important to explain why he chose this way, while being very clear that his decision will not change and is non-negotiable. You can't always satisfy everyone on the team but sometimes you have to break some eggs in order to make an omelet.