A resource matrix, often called a skills or competency matrix, is a tool used to map the resources (typically personnel) against the skills and knowledge required for various tasks or roles. The primary considerations are therefore 'capability' (the skills, qualifications, and proficiency levels of the staff) and 'capacity' (the availability of those staff members to perform the work). This matrix helps managers understand skill gaps, plan training, and allocate the right people to the right jobs effectively, ensuring operational readiness and efficiency.

A. Cost efficiency and availability are outcomes or constraints, not the primary axes of a resource matrix.

C. Age and gender are protected personal attributes and are irrelevant and improper for professional resource planning.

D. Preferences of the staff member are a secondary consideration for morale, not a primary input for the matrix.

1. Project Management Institute. (2017). A Guide to the Project Management Body of Knowledge (PMBOK® Guide) – Sixth Edition. Section 9.2: Estimate Activity Resources. (This standard describes tools like a resource breakdown structure and resource requirements, which are based on the capability and capacity of resources).

2. Armstrong, M., & Taylor, S. (2020). Armstrong's Handbook of Human Resource Management Practice (15th ed.). Kogan Page. Chapter 29: Competency-Based Management. (This text details the creation of competency frameworks and matrices based on skills and capabilities for workforce planning).