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What is Internal Control?

Internal control is a process, effected by management and other personnel, designed to provide reasonable assurance regarding achievement of objectives in the following categories:

Internal control consists of five interrelated components as follows:

All components are relevant to each objectives category. When looking at any one category, all five components must be present and functioning effectively to conclude that internal control over operations is effective.

Who is Responsible for Internal Controls?

Management establishes the goals for the program or department, and determines the policies and procedures which would achieve those goals. As such, management is responsible for the components of its internal control, i.e., establishes a control environment, assesses risks it wishes to control, specifies information and communication channels and content, designs and implements control activities, and monitors, supervises, and maintains the controls.

When is Internal Control Effective?

Internal control can be judged effective in each of the three categories, respectively, if management have reasonable assurance that they understand the extent to which:

Note: The above definition of internal control and related concepts are taken directly from Internal Control -- Integrated Framework by the Committee of Sponsoring Organizations of the Treadway Commission.

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Testing Internal Controls

The auditor should gain an understanding of and evaluate the auditee's internal control relative to the audit objectives. The auditor achieves this understanding during their gathering of background information and preliminary surveys/interviews. There will be situations which the auditor will need to develop an internal control questionnaire (ICQ) to assist them interview the auditee regarding the controls within a process. The auditor should review prior audit files and ask the management team to determine if an ICQ already exists. Standard questionnaires can be found in the notebook titled "I.C. Quest. Blanks" on the hall shelf.

The evaluation of the strengths or weaknesses in internal control allows the auditor to make decisions determining the nature, timing, and extent of the audit tests necessary to satisfy the objectives of the audit. The information obtained may be summarized in questionnaires, narrative memoranda, flowcharts, or decision tables. Significant weaknesses may require the revision of the scope. The auditor should also make constructive suggestions to improve controls where weaknesses are noted. Significant weaknesses may require the issuance of an Interim Audit Memorandum.

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