As a manager or leader, do you regard your staff as a customer?

No, i will not because they are actully part of my team and they will be biased surely.

In the Process approach - Every individual to whom you supply inputs is your customer!

Staff is your customer for recieving inputs, guidelines on any project, without this they may not be able do their job!!

SIPOC model exactly defines this....

I agree with Mr Ahamed

In principle I am agree with Ahmed Shreef. The5 essentials of successful customer service are also true for your staff output or performance:

1. Knowing the customer and their needs
2. Inviting customer’s perception of your service delivery to match or exceed their expectation
3. Maintaining positive and future focused attitude and approach with customers
4. Leveraging your strengths to increase loyalty and create long term relationships
5. Handling difficult and out of control customers for win-win outcomes

No, I believe that staff is a team.. and by definitiion, a team is a group of people that works towards a common purpose... to serve our customers is the best way possible. 

No, my staff are part of a team - everyone else we deal with is our customer

I see that as a manger I am my staff's customer and not vice versa. My staff could be regarded as my suppliers in this context.