You're only as strong as your weakest link, so you've got to make sure everybody in your crew is on point. Meaning. The success of your entire group depends on each person in your group. So if one person fails, the whole group fails.
Whether you are the leader of a group or a member, know that that group's success depends on each person's success. Even if all the links or members of your group are substantial and only one person is weak, it will affect the success of your group. As you take time to improve in one area, ensure you pay attention to all other areas. Try to find out the weakest link in your crew and make an effort to strengthen it.
It doesn't matter if your team is one of the best if some people need to catch up. So try to look for a way to strengthen your weak link to improve the strength of your team. You don't want everything crashing down because of a weak link. Remember, a weak link is a vulnerable group.