Do not simply tell your boss that your colleague is a slacker. Prepare arguments to gain his attention. You can, for example, ask your boss for advice how you should continue working on a project when your colleague is not able to complete his part.
4. Do not get involved in slacking
Lazy colleagues tend to teach others their habits. However, you do not have to sit with them at lunch for two hours or schmooze with them every time they stop at your desk. Tell them clearly that you do not have time. If you share responsibility to complete a task, remind them what they still have to do.
5. Take the opportunity to become a leader
Show your boss that you are interested in solving difficult situations. Volunteer as a leader who will try to help the colleague to fulfill his objectives. It may turn out that he is not lazy, he may only be unable to organize his time or he may currently be addressing a personal problem.
6. Disagree with common projects
If you really have a chronically lazy colleague, avoid working on projects when you would depend on the lazy colleague's performance. If you have to work together, you will have to count with his laziness when planning the work on the project. You can also use this opportunity to appeal to your boss to give you more resources.
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Article source Forbes.com - prestigious American business magazine and website