The appropriate formula to calculate residual risk is (Probability of events) × (Impacts). Residual risk is the risk that remains after controls are implemented to mitigate the inherent risk. It reflects the remaining exposure after considering the effectiveness of existing controls. This formula takes into account the likelihood of an event occurring and the potential impact if it does occur. References: IIA Practice Guide - Assessing the Adequacy of Risk Management Processes, COSO Framework

One of the five attributes that internal auditors include when documenting a deficiency is the criteria used to make the evaluation. The criteria represent the standards, measures, or expectations used in the evaluation process. Documenting the criteria is essential as it provides a benchmark against which the actual conditions can be compared, thereby helping to identify and explain deficiencies in controls or processes.
The Institute of Internal Auditors (IIA) Standard 2410 - Criteria for Communicating: "Final communication of engagement results must, where appropriate, contain the internal auditors' overall opinion and/or conclusions, as well as the criteria used for evaluation." IIA Practice Guide on "Documenting Internal Audit Observations"

The balanced scorecard, introduced by Robert Kaplan and David Norton, includes four main components that provide a comprehensive view of an organization's performance. These components are:
* Financial Measures - to track financial success and shareholder value.
* Learning and Growth - to foster an environment of continuous improvement and innovation.
* Customers - to measure customer satisfaction and market share goals.
* Internal Processes - to ensure that critical operations and business processes are running efficiently.
These elements together help an organization balance short-term objectives with long-term goals.
References:
* Kaplan, R.S., & Norton, D.P. (1996). The Balanced Scorecard: Translating Strategy into Action.

Matching invoices to receiving reports ensures the organization only pays for goods it has actually received, addressing completeness and accuracy in financial transactions. This procedure aligns with the COSO Internal Control Framework's principles regarding transaction processing and control activities. It mitigates risks of paying for unordered or unreceived goods, a common source of errors and potential fraud in the accounts payable process. The IIA's CIA Part 2 syllabus emphasizes testing of key controls in financial systems, including those preventing overpayments (Section II: Audit Engagements).

Both job order cost systems and process cost systems track three manufacturing cost elements: direct materials, direct labor, and manufacturing overhead. These cost elements are essential in calculating the total production cost and determining the cost per unit.
* Direct Materials: The raw materials directly used in the production of goods.
* Direct Labor: The wages of workers who are directly involved in manufacturing the products.
* Manufacturing Overhead: Indirect costs associated with production, such as utilities, maintenance, and depreciation of equipment.
References:
"Cost Accounting: A Managerial Emphasis," which details the tracking of manufacturing costs in different costing systems .