What is the productivity for Fork Lift Operators working in your organization?

Dear Colleagues, To carry out a study I need to know what is benchmark per forklift operator productivity, i.e. how much tons of material he handles/shifts per 8 hours? What is the productivity for Fork Lift Operators working in your organization?
You are requested to please share the same.
Shailesh Parikh

Dear Shailesh,
May we know your background. For example, do you have any experience in setting productivity targets based on Time and motion study? We also need some information on the scenario; for example, what is the nature of industry and what type of forklift trucks do you use.