Defining the mission
The portfolio of services depends on the organization's mission, which can be of different nature:
Your XRF laboratory or group may be part of an institute, agency, ministry or other non-commercial type of organization, to which you are supposed to provide some analytical services. For example, a XRF laboratory is established to provide analytical support to research/service mission of the Organization.
Your unit may be responsible for the qualitative and quantitative characterization of materials produced by a given manufacturer.
Your XRF laboratory might be looking for insertion in the market of analytical services. In that case, your tasks will vary depending on the customers needs, and you will have regular and occasional customers. The definition of your mission shall reflect that versatility as one of your strengths!