Keeping track of time

I am using sharepoint in the office 365 suite.  I have a production schedule set up that has a number of columns.  We use this to track orders as they are built.  One of the columns has the techinicians name which is entered when they are assigned a job to work on.  Would like to be able to have this technician clock in and out on the job and be able to keep this time in a log for each order.