What is the systematic numeric method of classifying various categories of costs for accounting purposes called?

The systematic numeric method of classifying various categories of costs for accounting purposes is known as the Code of Accounts. This method serves as a framework that assigns unique numerical or alphanumeric identifiers to different categories of costs. This classification enables efficient tracking, monitoring, and reporting of costs associated with various projects, which is crucial for cost control as well as financial analysis.

Using a Code of Accounts allows for consistency and clarity when communicating financial information amongst stakeholders. It helps in organizing costs for reporting and ensures that everyone involved in the project or organization understands the categories used explicitly. This systematization is particularly beneficial in large projects where numerous cost items need to be accounted for accurately.

In contrast, other options like Cost Structure pertain to the composition and proportion of different types of costs within an organization, Cost Accounting focuses broadly on the recording and reporting of costs, and Financial Reporting typically involves presenting financial information to external parties, rather than categorizing internal cost structures. Therefore, the Code of Accounts is the most precise answer concerning systematic numeric classification of costs.