Ofcourse the situation will be unique.

1) Well this totally depends on the type of process. If you have a team of 4 members and 2 are asking for marriage leave, then first of all look the dates of their

marriage. Because you cannot deny to give them the leaves for the marriage.

2) If you have a team of 4 members then its quite possible that it was being taken into consideration that one or 2 members may ask for the leave, so the team should be able to run with 3 members .

3) Make everyone aware about the scenario and let everyone know that they need leaves for the

marriage. If the marriage dates have slight difference then its good for you.

Then you can actually ask the members also if they can shorten the time-span of the leaves.

4) Moreover if the process is a backend process where you your self are trained, Then I dont think that you should be ashamed of helping others 2, and if needed then can request others to work little longer than the normal hours.