How to Restrict other users from editing perticular project

Dear Guys,

what are the different ways to restrict the other users who are viewing to edit the data.

i tried to use the exclusive status to the project but again when I see the status from other users it is still in shared mode.why is this happening.

I tried with the check in and check out status but once if you check out the project the other users can check in and make the changes they require.

so guys please suggest me the way i can lock the project so that no one can edit it.

 

 

Thanks in advance