|A party of adventurers making a group survival check|
The PHB tells to use Group Checks when a number of individuals are trying to attempt something as a group and they will either all fail or all succeed. In the rules, it says that to do a group check all involved must make the check as usual. If half of the group succeeds, then all the group succeeds. I would like to expand on these explanations a little bit analysing the possible uses of Group Checks and, in the end of the article, propose a variation of roll using the average of all characters' skills instead of rolling for each of them separately.