Continuous Monitoring Plan for Nonnetworked Systems

A Practical Approach to Continuous Control Monitoring

Author: David Vohradsky, CISA, CRISC, CISM, CGEIT, CDPSE
Date Published: 1 March 2015
中文
Download PDF

One of the responsibilities of line management in many organisations (particularly in financial services) is to provide assurance to the chief executive officer (CEO) and executives that high-rated risk factors are managed and that appropriate controls are in place and operating effectively.¹ With increases in the regulatory regime, increasing technology complexity and pressures on cost, organisations are seeking productivity improvements in the evaluation of the performance of internal controls. One method of productivity improvement is applying technology to allow near continuous (or at least high-frequency) monitoring of control operating effectiveness, known as continuous controls monitoring (CCM).² CCM is a subset of continuous assurance, alongside continuous data assurance (verifying the integrity of data flowing through systems) and continuous risk monitoring and assessment (dynamically measuring risk).

Improved management and monitoring of controls through CCM (and associated risk management activities) may reduce the extent to which audit and assurance staff need to undertake annual detailed testing of controls.³ In addition to cost reductions through improved efficiency and effectiveness (figure 1), other benefits include increased test coverage (through greater sampling and the ability to do more with the same or less labour), improved timeliness of testing, reduced risk velocity and potentially reduced remediation cost, greater visibility (when included in a governance, risk and compliance [GRC] solution), improved consistency, and the ability to identify trends.^{4 , 5} CCM also allows the replacement of manual, error-prone preventive controls with automated detective controls in which this would reduce the risk profile.⁶

The steps for implementing CCM include:^{7 , 8 , 9}

1. Identify potential processes or controls according to industry frameworks such as COSO, COBIT 5 and ITIL; define the scope of control assurance based on business and IT risk assessments; and establish priority controls for continuous monitoring.
2. Identify the control objectives (or goals) and key assurance assertions for each control objective. (Guidelines for the formalisation of assertions may need to be developed as the concept of formal assertions is not well developed within IT risk).
3. Define a series of automated tests (or metrics) that will highlight (or suggest) success or failure of each assertion using a "reasonable person holistic review."¹⁰
4. Determine the process frequencies in order to conduct the tests at a point in time close to when the transactions or processes occur.
5. Create processes for managing the generated alarms, including communicating and investigating any failed assertions and ultimately correcting the control weakness.

Defining Controls to Monitor

The scope of overall IT control assurance is usually determined from critical business and IT processes, which are prioritised based on risk and prior experience in reviewing the controls through audits, self-assessments and control breakdowns. For the purposes of example, one can assume the organisation has determined a scope of annual control assurance based on the controls in figure 2.

Of these controls, the priorities for implementation of CCM^{11 , 12 , 13} should be based on risk ratings/return on investment (ROI) (such as value to the organisation) and ease of implementation (such as having readily available data from systems and controls that already have an aspect of monitoring and reporting).

In the figure 2 example, the high-profile controls highlighted by the internal audit function have been assessed against data availability and existing monitoring or metrics. Controls highlighted in green are candidates for continuous control monitoring (red indicates a roadblock that may preclude a control from being considered). The priority or suitability of controls for continuous monitoring also needs to consider the relationships among controls. For example, configuration and vulnerability management rely on asset management, which may be deficient and not suitable for inclusion in the scope of assurance. In such a case, the controls that depend on it may not be suitable for continuous monitoring.

Identifying Assertions

Processes for management assurance of controls are usually more informal than an audit because they are often based on professional judgment, rather than detailed testing. An audit is a systematic process in which a qualified team or person objectively obtains and evaluates evidence regarding assertions about a process and forms an opinion on the degree to which the assertion is implemented.¹⁴ To automate an assurance process, control descriptions need to be reviewed to separate those components of the control that can be formally tested and those components that will rely on professional judgement.¹⁵

Internal control objectives in a business context are categorised against five assertions used in the COSO model¹⁶ —existence/occurrence/validity, completeness, rights and obligations, valuation, and presentation and disclosure. These assertions have been expanded in the SAS 106, "Audit Evidence,"¹⁷ and, for the purposes of a technology context, can be restated in generic terms, as shown in figure 3.

COSO objectives are known as enterprise goals, IT-related goals and enabler goals in COBIT 5,¹⁸ and the financial statement assertions are loosely translated in the technology context to "completeness, accuracy, validity and restricted access."¹⁹ Much (if not all) of the literature on CCM relates to business processes, and, as such, there is no documented alignment or mapping among IT control objectives (or goals) and the formal assertions necessary for formalised objective testing.

In an attempt to bridge this gap, figure 4 compares example control descriptions against related guidance from an IT security context and the related COBIT 5 goals, and proposes a formal assertion that could be used in a CCM context.

Defining Automated Tests

To continuously assess controls, rules need to be developed to test in real-time (or near-real-time) compliance with the previously mentioned formal assertions that are required to be made about the selected controls.²⁰ The required tests can be classified^{21 , 22} into seven broad categories based on traditional audit processes or evidence types:

1. Asset management queries (where accurate), in place of physical examination of assets
2. Electronic transaction confirmations, in place of authenticated transaction documents, including verifying atomic elements of transactions
3. Electronic statement queries, in place of internal or external documentation
4. Re-performance of selected controls, using some form of automation
5. Observation (still a manual periodic test)
6. Analytical procedures, such as statistical analysis, comparisons with other internal or external data sets, and pattern-matching within transaction data
7. Automating collation of responses to inquiries such as control self-assessment surveys

The types of tests that could be employed in the case study example appear in figure 5.

Generally, tests need to answer the question: What would the data look like if the control objective was met or was not met?²³

Asset management queries and transaction confirmation (type 1 and 2) tests can use existing or improved key risk indicators (KRIs) to provide what is described²⁴ as a risk indicator continuous assurance (RICA) framework. Past audit report evidence can also be used to identify sources of data and applicable analytics.²⁵ In this testing approach, a designated threshold being met in two or more consecutive months (or the majority of the time) may indicate a strong control, whereas the threshold not being met in two or more consecutive months may indicate a weak control.²⁶

Statement (or tabular data) tests (type 3) can use a belief function approach,²⁷ in which evidence for and against an assertion is mathematically combined (or aggregated) to determine a result. In this approach, assurance levels are divided into five categories (very low, low, medium, high and very high) based on value ranges. For example, the strength of evidence supporting completeness of testing could be determined by ranges of test coverage or ranges of outstanding defect percentages.

Large data sets or complex behavioural controls may require analytical testing (type 6) to validate an assertion. This analysis may employ a risk score methodology²⁸ or probability models²⁹ to create an equal distribution of values 0 to 1 across all samples, with bands reflecting confidence in the assertion. The analysis may be based on:

• Higher or lower than expected values
• Expected or opposite to expected movement
• Small or large changes from one period to the next
• Process metrics
• Erratic behaviour or volatility (variance) in the process

Assertions that need to be tested by subjective judgement (type 7, such as those obtained through control self-assessments by service managers or vendors) can be validated³⁰ through the Delphi Method. In this approach, a more accurate consensus of control effectiveness is obtained through one or more rounds of anonymous self-assessments, which may be reviewed, and feedback provided by experts between rounds.

Planning for the implementation of any of the previously described automated tests needs to take into account likely difficulties such as obtaining data management approvals; data sourcing and aggregation lead times; the need for control domain expertise; technology acquisition and integration costs; and the need for information sharing and coordination among audit, risk and compliance functions.³¹

Reporting

Figure 6 shows the governance and management processes associated with control assurance. Management monitors processes through mechanisms including KRIs, which are used to alert the business to potential control issues and are part of a continuous improvement cycle.

CCM takes selected KRIs and the results of other tests and analytics on processes and forms part of an overall control assurance program (CAP) in which the concerns over the monitored controls are validated before being prioritised and acted upon alongside issues identified by other periodic manual testing.³² Additional risk and key control deficiencies may also be identified through management risk and control self-assessments (RCSA) that form part of the program based on management knowledge gained through operating the plan-build-run-monitor cycle. Integrated issue management using a GRC platform facilitates³³ digitisation, automation of alerts and management of remediation activities, once agreed upon by management.

Mature KRIs linked to formal assertions are continuously monitored and reported, automatically form part of the risk and control profile, and are integrated into daily management processes.³⁴

Other KRIs that may be subject to false positives are used in day-to-day management of the process in question and adjusted to a point where they can be relied upon for management self-assessment and continuous improvement of the process.³⁵ As they mature, they can be incorporated in an expanded CCM regime.

Conclusion

This article provides guidance on the identification and prioritisation of controls for CCM implementation and introduces the need to transform COBIT (and other) management practices into formal assertions (in line with SAS 106) in order to facilitate objective automated testing. It defines the categories of testing available, maps a sample set of assertions to testing types and provides high-level guidance on applicable test rules.

Further work is needed to define formal assertions for the complete set of COBIT 5 management practices as a necessary precursor to the wider use of CCM within an IT risk context. This work ideally should occur with further development of COBIT 5 for Risk and other COBIT guidance from ISACA.

Endnotes

¹ Coderre, D., Global Technology Audit Guide—Continuous Auditing: Implications for Assurance, Monitoring, and Risk Assessment, Institute of Internal Auditors, 2005
² Vasarhelyi, M. A.; M. Alles; K. T. Williams; 'Continuous Assurance for the Now Economy', Institute of Chartered Accountants in Australia, 2010
³ MarFan, K.; IT Audit and Assurance Guideline G42, Continuous Assurance, ISACA, 2010
⁴ Deloitte, Continuous Monitoring and Continuous Auditing: From Idea to Implementation, 2010
⁵ Gohil, J.; 'Reduce Audit Time Using Automation, by Example', presentation to ISACA Atlanta Chapter, Protiviti, 2013
⁶ Op cit, Deloitte
⁷ Op cit, Coderre
⁸ International Organization for Standardization and International Electrotechnical Commission, ISO/IEC27002:2006, lnformation Technology—Security techniques—Code of practice for information security management, 2006
⁹ Op cit, Vasarhelyi 2010
¹⁰ Op cit, Standards Australia
¹¹ Op cit, Deloitte
¹² Op cit, MarFan
¹³ Op cit, Vasarhelyi 2010
¹⁴ ISACA, 2009 CISA Review Manual, USA, 2008
¹⁵ Op cit, Vasarhelyi 2010
¹⁶ ISACA, Relating the COSO Internal Control—Integrated Framework and COBIT, USA, 2014
¹⁷ American Institute of Certified Public Accountants (AICPA), SAS 106, 'Audit Evidence', February 2006
¹⁸ Op cit, ISACA 2014
¹⁹ ISACA, IT Assurance Guide: Using COBIT, USA, 2007
²⁰ Op cit, Coderre
²¹ Majdalawieh, M.; S. Sahraoui; R. Barkhi; 'Intra/Inter Process Continuous Auditing (IIPCA), Integrating CA Within an Enterprise System Environment', Business Process Management Journal, 18 (2), 2012, p. 304-327
²² Vasarhelyi, M. A.; M. G. Alles; A. Kogan; 'Principles of Analytic Monitoring for Continuous Assurance', Journal of Emerging Technologies in Accounting, vol. 1, p. 1-21, 2004
²³ Op cit, Coderre
²⁴ Nigrini, M. J.; A. J. Johnson; 'Using Key Performance Indicators and Risk Measures in Continuous Monitoring', Journal of Emerging Technologies in Accounting, vol. 5, 2008, p. 65-80
²⁵ Op cit, Vasarhelyi 2010
²⁶ Op cit, Dale
²⁷ Mock, T.J.; A. Wright; R. P. Srivastava; 'Audit Program Planning Using a Belief Function Framework', Proceedings of the 1998 Deloitte & Touch University of Kansas Symposium on Auditing Problems, USA, 1998, p. 115-142
²⁸ Op cit, Nigrini
²⁹ Alles, M. G.; A. Kogan; M. A. Vasarhelyi; 'Putting Continuous Auditing Theory Into Practice: Lessons From Two Pilot Implementations', Journal of Information Systems, 22 (2), 2008, p. 195-214
³⁰ Op cit, Vasarhelyi 2010
³¹ Vasarhelyi, M. A.; S. Romero; S. Kuenkaikaew; 'Adopting Continuous Auditing/Continuous Monitoring in Internal Audit', ISACA Journal, vol. 3 , 2012, p. 1-5
³² Op cit, Coderre
³³ Schermann, M.; M. Wiesche; H. Krcmar; 'The Role of Information Systems in Supporting Exploitative and Exploratory Management Control Activities', Journal of Management Accounting Research, vol. 24, 2012, p. 31-59
³⁴ Dale, J.; E. Chung Yee Wong; 'Achieving Continuous IT Auditing: RICA', ISACA Journal, vol. 6, 2009, p. 1-5
³⁵ Op cit, Coderre

David Vohradsky, CGEIT, CRISC, is an independent consultant with more than 30 years of experience in the areas of applications development, program management and information risk management. He has previously held senior-level management and consulting positions with Protiviti Inc., Commonwealth Bank of Australia, NSW State Government, Macquarie Bank, and Tata Consultancy Services. Vohradsky is a member of ISACA's CRISC Certification Committee. He can be contacted at davidvoh9@gmail.com.

bouxxxxxis.blogspot.com

Source: https://www.isaca.org/resources/isaca-journal/issues/2015/volume-2/a-practical-approach-to-continuous-control-monitoring

Share this post