Which of the following inputs into the sales and operations planning process is from the human resources function?

Cost data is primarily financial information related to production, materials, and overhead, typically sourced from the finance department. While important for overall planning, it does not originate from human resources and does not directly pertain to workforce aspects.

Product features are specifications and attributes of goods offered by a company, which are usually defined by the product development or marketing departments. This input is related to what is being sold rather than how the workforce can support sales and operations.

Machine capacity refers to the production capabilities of machinery and equipment, which is usually assessed by the operations or engineering departments. This information relates to physical resources rather than human resources, thus falling outside the scope of HR-related inputs.