A systematic coding structure for organizing and managing scope, assets, cost, resources, work and schedule activity information is a______________.

A Code of Accounts (COA) is a systematic coding structure used to uniquely identify each element of a project. It serves as the framework for integrating the work breakdown structure (scope), organizational breakdown structure (resources), and cost breakdown structure (cost). This integration allows for the organized collection, tracking, and management of all project information, including scope, assets, costs, resources, and schedule activities, within a single, hierarchical system. It is the primary mechanism for cost and schedule performance control.

A. A cost breakdown structure (CBS) is a component of the overall system but is limited to organizing and reporting costs, not all the elements listed.
C. Cost estimate classification is a system for categorizing estimates by their maturity and accuracy, not a coding structure for managing project work elements.
D. A schedule identification number is a unique identifier for a specific schedule activity, not a comprehensive structure for organizing all project information.

1. AACE International. (2019). Recommended Practice No. 10S-90: Cost Engineering Terminology. Morgantown, WV: AACE International.

Reference: The definition for "CODE OF ACCOUNTS (COA)" on page 25 states, "A systematic coding structure for organizing and managing scope, cost, resource, and schedule activity information... It is used to organize the work and relate it to the responsible organizational elements. It provides the basic control mechanism for the work, cost, and schedule." This directly matches the question's phrasing.

2. Hollmann, J. K., Editor. (2015). Total Cost Management Framework: An Integrated Approach to Portfolio, Program, and Project Management (2nd ed.). AACE International.

Reference: Section 7.2, "Work and Data Structuring," explains that the code of accounts is the coding structure that integrates the WBS, OBS, and CBS, providing the framework for project control and data management (p. 178).

3. AACE International. (2013). Recommended Practice No. 69R-12: Cost Estimate Classification System – As Applied in Engineering, Procurement, and Construction for the Process Industries. Morgantown, WV: AACE International.

Reference: Section 1.3, "Purpose," describes the system as one that provides guidelines for applying the five cost estimate classes, which are based on the level of project definition and maturity. This confirms it is a classification methodology, not a coding structure for managing work.