The type of system can be helpful in showing relationships between volumes of production and variable costs, and the resulting impacts on net income…

Marginal income analysis, also known as variable costing or the contribution margin approach, is a system that categorizes costs by behavior (variable vs. fixed). It calculates a contribution margin (Revenue - Variable Costs), which clearly illustrates how each unit sold contributes to covering fixed costs and generating profit. This structure allows for rapid analysis of how changes in production and sales volume directly impact net income. This is in contrast to full absorption costing, where fixed manufacturing costs are allocated to units, obscuring the direct cost-volume-profit relationship and making such analysis more complex.

B. pool average cost: This is a method for averaging costs within a specific cost pool for allocation purposes, not a comprehensive system for profit-volume analysis.

C. prerogative management contract: This is a type of legal or business agreement related to management authority and has no relevance to cost accounting systems.

D. cost allocation standard: This refers to a specific rule or guideline for assigning costs, not the overarching analytical system described in the question.

1. Horngren, C. T., Datar, S. M., & Rajan, M. V. (2015). Cost Accounting: A Managerial Emphasis (15th ed.). Pearson Education.

Chapter 9, "Inventory Costing and Capacity Analysis," pp. 310-312. This chapter explicitly contrasts variable costing (marginal costing) with absorption costing. It states, "Many managers find variable costing information useful for CVP analysis... The variable-costing-based income statement is prepared in the contribution-margin format, which provides the information needed for CVP analysis." This supports that the system is designed for analyzing relationships between volume and income.

2. Garrison, R. H., Noreen, E. W., & Brewer, P. C. (2018). Managerial Accounting (16th ed.). McGraw-Hill Education.

Chapter 6, "Variable Costing: A Tool for Management," pp. 240-241. The text explains, "Under variable costing, the contribution-margin format is used to prepare the income statement... This format makes it easy to see how changes in sales volume will affect contribution margin and net operating income." This directly aligns with the question's description of a system that quickly shows the impact of volume on net income.

3. MIT OpenCourseWare. (2004). 15.501 Introduction to Financial and Managerial Accounting, Spring 2004. Massachusetts Institute of Technology.

Session 20 Notes: Variable Costing. The course notes detail how variable costing avoids the issue of fixed cost allocation found in absorption costing, thereby providing a clearer view of cost-volume-profit relationships for internal decision-making. It highlights the contribution margin as the key metric for this analysis.