This document discusses different costing methods and their appropriate uses: - Full costing is best for long-term strategic decisions while variable/direct costing and cost-volume-profit (CVP) analysis are better for short-term decisions. - Both methods have limitations, such as questionable allocation of indirect costs and fixed costs per unit calculations. - Activity-based costing is more useful given increasingly complex products and processes with high indirect fixed costs. - Target costing also considers the entire product lifecycle from a market perspective.