Field costs refer to which aspect of project management?

Field costs are specifically associated with the expenses that are incurred at the project site during the execution of the work. This includes costs related to materials, labor, equipment, and any other resources that are necessary for the actual construction or execution of the project. These costs are typically direct expenses and contribute to the overall understanding of how much a project will cost in terms of delivering the work on-site.

The other options describe various other expenses that do not fit the definition of field costs. While costs associated with the planning phase relate to pre-construction activities, they do not occur on-site, and general office expenses and overheads refer to indirect costs that are not tied to the field activities. Likewise, labor costs associated with project design are part of the design phase and not the execution on the project site itself. Thus, option B, which encompasses the direct costs at the project site, accurately captures the essence of what field costs entail in project management.