Our software team works on small tasks. Each task takes about 2 weeks. There are developers whose performance is twice bigger than the other's (the level is the same).
Everybody just writes how much time he has spent on a task Jira at the end of the week (in Jira). It is difficult to find out whether someone's task is easier or somebody just works slower.
I'm thinking of the way to introduce kind of a metric to measure their performance, so that we can determine which developer needs help and which developer can instead provide help to the others.
I also want to track the team's performance over time - is it increasing or not.
The problem is that the tasks are not standard, they differ, so each task can really take different time. The problem is also that it is very difficult to know whether the time is spent effectively or not. And what the time is spent on.