STANDARD ON INTERNAL AUDIT (SIA) 14
INTERNAL AUDIT IN AN INFORMATION TECHNOLOGY
ENVIRONMENT*
Contents
Paragraph(s)
Introduction .......................................................................... 1-2
IT Environment- Matters to Consider............................................ 3
Skills and Competence ............................................................ 4-5
Planning ................................................................................... 6-9
Risk Assessment ................................................................. 10-12
Audit Procedures .......................................................................13
Review of Information Technology Environment ................... 14-15
Outsourced Information Processing ...........................................16
Documentation ...........................................................................17
Effective Date .............................................................................18
The following is the text of the Standard on Internal Audit
(SIA) 14, Internal Audit in an Information Technology
Environment, issued by the Council of the Institute of
Chartered Accountants of India. These Standards should be
read in conjunction with the Preface to the Standards on
Internal Audit, issued by the Institute.
In terms of the decision of the Council of the Institute of
Chartered Accountants of India taken at its 260 th meeting held
in June 2006, the following Standard on Internal Audit shall be
recommendatory in nature in the initial period. The Standards
shall become mandatory from such date as notified by the
Council.
Being Published in the March, 2009 issue of The Chartered Accountant.
*
Standard on Internal Audit (SIA) 14
Introduction
1. The purpose of this Standard on Internal Audit (SIA) is to establish
standards on procedures to be followed when an internal audit is
conducted in an information technology (IT) environment. An information
technology environment exists when one or more computer(s) of any type
or size is (are) involved in the processing of financial information, including
quantitative data, and other types of information processing whether those
computers are operated by the entity or by a third party. An IT system is a
system that uses technology to capture, classify, summarize and report
data in a meaningful manner to interested users, including an enterprise
resource planning (ERP) system.
2. The overall objective and scope of an internal audit does not change in
an IT environment. However, the use of a computer changes the
processing, storage, retrieval and communication of financial
information and the interplay of processes, systems and control
procedures. This may affect the internal control systems employed by
the entity. Accordingly, an IT environment may affect:
a) the procedures followed by the internal auditor in obtaining a sufficient
understanding of the processes, systems and internal control system;
and
b) the auditor's review of the entity's risk management and continuity
systems.
IT Environment Matters to Consider
3. The internal auditor should consider the effect of an IT environment
on the internal audit engagement, inter alia:
a. the extent to which the IT environment is used to record,
compile, process and analyse information; and
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Internal Audit in an Information Technology Environment
b. the system of internal control in existence in the entity with
regard to:
the flow of authorised, correct and complete data to the
processing centre;
the processing, analysis and reporting tasks undertaken in
the installation; and
the impact of computer-based accounting system on the
audit trail that could otherwise be expected to exist in an
entirely manual system.
Skills and Competence
4. The internal auditor should have sufficient knowledge of the
information technology systems to plan, direct, supervise, control
and review the work performed. The sufficiency of knowledge would
depend on the nature and extent of the IT environment. The internal
auditor should consider whether any specialised IT skills are needed
in the conduct of the audit, for example, the operating knowledge of
a specialised ERP system. Specialised skills may be needed, for
example, to:
a) obtain sufficient understanding of the effect of the IT environment on
systems, processes, internal control and risk management systems;
b) design and perform appropriate tests of control and substantive
procedures; and
c) determine the effect of the IT environment on assessment of overall
audit risk.
5. If specialized skills are needed, the internal auditor should seek the
assistance of a technical expert possessing such skills, who may
either be the internal auditor's staff or an outside professional. If the
use of such a professional is planned, the internal auditor should, in
accordance with SIA16, "Using the Work of an Expert", obtain
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Standard on Internal Audit (SIA) 14
sufficient appropriate evidence that the work performed by the
expert is adequate for the purposes of the internal audit.
Planning
6. The internal auditor should obtain an understanding of the systems,
processes, control environment, risk-response activities and internal
control systems sufficient to plan the internal audit and to determine
the nature, timing and extent of the audit procedures, in accordance
with SIA 1, "Planning an Internal Audit". Such an understanding would
help the internal auditor to develop an effective audit approach.
7. In planning the portions of the internal audit which may be affected
by the IT environment, the internal auditor should obtain an
understanding of the significance and complexity of the IT activities
and the availability of the data for use in the internal audit. This
understanding would include such matters as:
i) the information technology infrastructure [hardware, operating
system(s), etc., and application software(s)] used by the entity
including changes, if any, therein since last audit.
ii) the significance and complexity of computerised processing in each
significant application. An application may be considered to be
complex when, for example:
a) the volume and materiality of transactions is such that users
would find it difficult to identify and correct errors in processing.
b) the computer automatically generates material transactions or
entries directly to another application.
c) the computer performs complicated computations of financial
information and/or automatically generates material transactions
or entries that cannot be (or are not) validated independently.
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Internal Audit in an Information Technology Environment
d) transactions are exchanged electronically with other
organisations [as in electronic data interchange (EDI) systems]
without manual review for propriety or reasonableness.
iii) determination of the organisational structure of the client's IT activities
and the extent of concentration or distribution of computer processing
throughout the entity, particularly, as they may affect segregation of
duties.
iv) determination of the availability of data. Source documents, computer
files, and other evidential matter that may be required by the internal
auditor may exist for only a short period or only in machine-readable
form. Information Technology systems may generate reports that
might be useful in performing substantive tests (particularly analytical
procedures). The potential for use of computer-assisted audit
techniques may permit increased efficiency in the performance of
internal audit procedures, or may enable the auditor to economically
apply certain procedures to the entire population of transactions.
8. When the information technology systems are significant, the
internal auditor should also obtain an understanding of the IT
environment and whether it influences the assessment of inherent
and control risks. The nature of the risks and the internal control
characteristics in IT environments include the following:
a. Lack of transaction trails: Some IT systems are designed so that a
complete transaction trail that is useful for audit purposes might exist
for only a short period of time or only in computer readable form.
Where a complex application system performs a large number of
processing steps, there may not be a complete trail. Accordingly,
errors embedded in an application's program logic may be difficult to
detect on a timely basis by manual (user) procedures.
b. Uniform processing of transactions: Computer processing uniformly
processes like transactions with the same processing instructions.
Thus, the clerical errors ordinarily associated with manual processing
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Standard on Internal Audit (SIA) 14
are virtually eliminated. Conversely, programming errors (or other
systemic errors in hardware or software) will ordinarily result in all
transactions being processed incorrectly.
c. Lack of segregation of functions: Many control procedures that would
ordinarily be performed by separate individuals in manual systems
may become concentrated in a IT environment. Thus, an individual
who has access to computer programs, processing or data may be in
a position to perform incompatible functions.
d. Potential for errors and irregularities: The potential for human error in
the development, maintenance and execution of computer information
systems may be greater than in manual systems, partially because of
the level of detail inherent in these activities. Also, the potential for
individuals to gain unauthorised access to data or to alter data without
visible evidence may be greater in IT than in manual systems. In
addition, decreased human involvement in handling transactions
processed by computer information systems can reduce the potential
for observing errors and irregularities. Errors or irregularities occurring
during the design or modification of application programs or systems
software can remain undetected for long periods of time.
e. Initiation or execution of transactions: Information Technology
systems may include the capability to initiate or cause the execution
of certain types of transactions, automatically. The authorisation of
these transactions or procedures may not be documented in the
same way as that in a manual system, and management's
authorisation of these transactions may be implicit in its acceptance of
the design of the information technology systems and subsequent
modification.
f. Dependence of other controls over computer processing: Computer
processing may produce reports and other output that are used in
performing manual control procedures. The effectiveness of these
manual control procedures can be dependent on the effectiveness of
controls over the completeness and accuracy of computer
processing. In turn, the effectiveness and consistent operation of
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Internal Audit in an Information Technology Environment
transaction processing controls in computer applications is often
dependent on the effectiveness of general computer information
systems controls.
g. Potential for increased management supervision: IT systems can offer
management a variety of analytical tools that may be used to review
and supervise the operations of the entity. The availability of these
analytical tools, if used, may serve to enhance the entire internal
control structure.
h. Potential for the use of computer-assisted audit techniques: The case
of processing and analysing large quantities of data using computers
may require the auditor to apply general or specialised computer audit
techniques and tools in the execution of audit tests.
Both the risks and the controls introduced as a result of these
characteristics of information technology systems have a potential impact
on the internal auditor's assessment of risk, and the nature, timing and
extent of audit procedures.
9. While evaluating the reliability of the internal control systems, the
internal auditor should consider whether these systems, inter alia:
a. ensure that authorised, correct and complete data is made
available for processing;
b. provide for timely detection and correction of errors;
c. ensure that in case of interruption in the working of the IT
environment due to power, mechanical or processing failures,
the system restarts without distorting the completion of the
entries and records;
d. ensure the accuracy and completeness of output;
e. provide adequate data security against fire and other calamities,
wrong processing, frauds etc;
f. prevent unauthorised amendments to the programs; and
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Standard on Internal Audit (SIA) 14
g. provide for safe custody of source code of application software
and data files.
Risk Assessment
10. The internal auditor should make an assessment of inherent and
control risks for material assertions related to significant processes
and systems. These assertions apply to significant processes and
systems for example - sales, procurement, inventory management,
production, marketing, human resources and logistics.
11. The internal auditor should review whether the information
technology system in the entity considers the confidentiality,
effectiveness, integrity, availability, compliance and validity of data
and information processed. The internal auditor should also review
the effectiveness and safeguarding of IT resources, including
people, applications, facilities and data.
12. The inherent risks and control risks in an IT environment may have both a
pervasive effect and an account-specific effect on the likelihood of material
misstatements, as follows:
a. The risks may result from deficiencies in pervasive IT activities such
as program development and maintenance, system software support,
operations, physical IT security and control over access to special-
privilege utility programs. These deficiencies would tend to have a
pervasive impact on all application systems that are processed on the
IT system.
b. The risks may increase the potential for errors or fraudulent activities
in specific applications, in specific databases or master files, or in
specific processing activities. For example, errors are not uncommon
in systems that perform complex logic or calculations, or that must
deal with many different exception conditions. Systems that control
cash disbursements or other liquid assets are susceptible to
fraudulent actions by users or by IT personnel.
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Internal Audit in an Information Technology Environment
Audit Procedures
13. The internal auditor should consider the IT environment in designing
audit procedures to review the systems, processes, controls and risk
management framework of the entity.
Review of Information Technology Environment
14. The internal auditor should review the robustness of the IT
environment and consider any weakness or deficiency in the design
and operation of any IT control within the entity, by reviewing:
a) System Audit reports of the entity, conducted by independent
Information System auditors;
b) Reports of system breaches, unsuccessful login attempts,
passwords compromised and other exception reports;
c) Reports of network failures, virus attacks and threats to
perimeter security, if any;
d) General controls like segregation of duties, physical access
records, logical access controls;
e) Application controls like input, output, processing and run-to-
run controls; and
f) Excerpts from the IT policy of the entity relating to business
continuity planning, crisis management and disaster recovery
procedures.
An illustrative checklist of IT controls to be reviewed by the internal auditor
is given in the Appendix to this Standard.
15. If the internal auditor is not able to rely on the effectiveness of the IT
environment as a result of the review, he may perform such substantive
testing or test of IT controls, as deemed fit in the circumstances. The
internal auditor should apply his professional judgment and skill in
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Standard on Internal Audit (SIA) 14
reviewing the IT environment and assessing the interfaces of such IT
infrastructure with other business processes.
Outsourced Information Processing
16. The internal auditor should assess and review the reliance which the
management of the entity places on the outsourced agency, in case
where such information processing has been outsourced to the
outside party. The risks associated with such outsourced services
should be considered by the internal auditor in light of the review of
IT controls prevalent in such outside entity. The internal auditor
should also review the extent to which the entity's controls provide
reasonable assurance regarding the completeness, validity,
reliability and availability of the data and information processed by
such outsourced agency.
Documentation
17. The internal auditor should document the internal audit plan, nature,
timing and extent of audit procedures performed and the
conclusions drawn from the evidence obtained. In an internal audit in
IT environment, some or all of the audit evidence may be in the electronic
form. The internal auditor should satisfy himself that such evidence
is adequately and safely stored and is retrievable in its entirety as
and when required.
Effective Date
18. This Standard on Internal Audit is applicable to all internal audits
commencing on or after ______. Earlier application of the SIA is
encouraged.
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Internal Audit in an Information Technology Environment
Appendix
Illustrative Information Technology Controls to be
Reviewed During Internal Audit in An IT Environment
(Refer paragraph 14)
(The Appendix is only illustrative in nature and does not form part of the
Standard)
Sr. No. CONTROL PARAMETERS
IT Access Control
1 There is a structured IT Policy and facility personnel are aware of
the applicable policies.
IT Back-up and Recovery
2 The network has adequately documented backup and recovery
procedures/plans/schedules for critical sites.
3 LAN is supported by an uninterruptible power supply (UPS).
4 UPS tested in the last year (to test the batteries)?
5 For disaster-recovery purposes, LAN applications have been
prioritized and scheduled for recovery based on importance to the
operation.
IT Environmental Controls
6 Smoke detection and automatic fire-extinguishing equipments
installed for adequate functioning and protection against fire
hazards.
IT Inventory
7 There is a complete inventory of the following: Hardware:
Computers, File Servers, Printers, Modems, Switches, Routers,
Hubs, etc. Software: all software for each Computer is logged with
licenses and serial numbers.
8 There are written procedures for keeping LAN inventory and they
identify who (title) is responsible for maintaining the inventory
report.
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Standard on Internal Audit (SIA) 14
9 Unused equipment is properly and securely stored.
IT Operations
10 LAN administrator has a backup person.
11 LAN administrator monitors the LAN response time, disk storage
space, and LAN utilization.
12 LAN administrator is experienced and familiar with operation of
the LAN facility.
IT Physical Security
13 Alarms installed at all potential entry and exist points of sensitive
areas.
IT Service Agreements
14 Vendor reliability considered before purchasing LAN hardware and
software.
15 Service log maintained to document vendor support servicing.
16 LAN hardware and software purchase contracts include
statements regarding vendor support and licensing.
IT Virus Protection Policy
17 The level of virus protection established on servers and
workstations is determined and the monitoring of infection are
being done by IT administration. Virus Application should be
updated on a monthly basis. Laptops if issued should be ensured
to have secured internet access.
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