I need a document (pdf, excel...) to record information on incoming jobs

Hello, l am a Welder by trade and have a few subcontractors working for me so l need to keep track of what jobs they are doing and how far they have progressed. I have an incoming purchase order that is a pdf file. I need the information taken from that purchase order and transferred to another document that displays the original information plus a few extra columns indicating a start and stop time for each jobs, Total minutes spent working on that job and the number completed during that time. Regarding the start and stop time, l would prefer a button that says start and stop for each job so when they start the job, they enter their user ID number then click start, when they finish they click stop. It would then calculate the number of minutes spent working on that job. I would like the information to be entered either from a desktop or a tablet when they are out on the floor. I don't know whether this can all be made into a document eg, pdf or does it need to be some basic software to handle the information.