Planning is the plan of action that determines the procedures necessary to achieve the audit objectives. Is achieved by testing to obtain evidence to support the auditor's opinion, taking into account the materiality and audit risk. Process Audit Planning: The planning process, the auditor should consider inter alia : A) An adequate understanding of the entity's business, the sector in which it operates and the nature of their transactions. B) The procedures and accounting principles applied by the company and the consistency with which they are applied and the accounting systems for recording transactions. C) The degree of efficiency and reliability initially expected internal control systems. Contents of the letter of proposal in accordance with auditing standards. The preliminary analysis starts with the customer contact to obtain adequate information on, is establish the terms of the audit and the scope of work, will know the client's expectations. Fixing the fees and the number of estimated hours for the job. Also worth noting both the form and methods of work as auditor requirements (access to files, internal audit report, staff collaboration.) Likewise, the auditor should refer to the system of internal control and the letter of recommendations that will be sent to the client. Likewise, the auditor should review the previous audit results, analysis of recent financial information, check the accounting principles and standards applied to determine the relative importance and nature of the tests will be performed. Audit Program: The realization planning, specifying procedures to be applied in each area, as well as tests to be performed on transactions, experience and ability to perform them, signs on to be consummated (size, method selection), and the time to implement specific evidence. Audit programs meet two objectives: - Coordination of audit work and the Registry of work, documented in the PT, which serves as proof against third parties and enables the monitoring. The audit program consists of 3 parts: - Introduction, identifies the company. -Objectives of the work, which sets specific objectives in the area, in accordance with the general objectives identified in audit planning. - Audit Procedures. Planning: The action plan sets out the procedures necessary to achieve audit objectives. Is achieved by testing to obtain evidence to support the auditor's opinion, taking into account the materiality and audit risk. The relevant areas in which the auditor should pay more attention to the time of preparing the audit program. Hotspots: are those which by their nature are particularly sensitive to the possibility of making mistakes in their figures, can vary from one company to another (eg foreign currency balances, loans to directors). -Significant areas, are named for the importance of the amount of alleged interest to users of accounting data. They tend to be common to companies in the same type (eg fixed assets, sales and stocks). - Additional areas are those which have a high interest to the company. Despite being unimportant to the auditor, should not ignore.