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AI2.2 - Detailed Design

This topic is intended to enable collaboration and sharing of information to facilitate a better understanding and approach to implementing this COBIT control objective based on the risk, value and guidance provided by its corresponding control practices.

COBIT Control Objective AI2.2 - Detailed Design is contained within Process Popup Acquire and Maintain Application Software.

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Detailed Design

Prepare detailed design and technical software application requirements. Define the criteria for acceptance of the requirements. Have the requirements approved to ensure that they correspond to the high-level design. Perform reassessment when significant technical or logical discrepancies occur during development or maintenance.

View value and Risk Drivers  help

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Value Drivers

  • Reduced costs
  • Efficient application coding and maintenance
  • Prioritisation on important features
  • Avoidance of data redundancy
  • Application meeting usability requirements
  Risk Drivers
  • Processing of invalid transactions
  • Increasing costs for system redesign
  • Data in application systems processed incorrectly

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  1. Classify data inputs and outputs according to information architecture and data dictionary standards.
  2. Assess the impact on existing applications and infrastructure during the process of gathering requirements and designing the solution, and design appropriate integration approaches. Address integration of the planned application system with existing or planned co-operating applications and infrastructure, including packaged software acquired from third parties. Consider the impact of differing update cycles.
  3. Specify the source data collection design, documenting the data that must be collected and validated for processing transactions as well as the methods for validation. Consider data inputs from existing programs, packaged software, external parties, web forms, etc.
  4. Define system availability requirements, and design appropriate redundancy, failure recovery and backup processing arrangements.
  5. Define file and database requirements for storage, location and retrieval of data. Consider availability, control and auditability, security, and network requirements.
  6. Define the processing steps, including specification of transaction types and processing rules incorporating logic transformations or specific calculations. Consider availability, control and auditability, logging, and audit trails.
  7. Based on the user requirements and taking into account the different types of recipients, usage, details required, frequency, method of generation and other design details, define the data requirements for all identified outputs. Appropriate design requirements should guarantee the availability, completeness, integrity and confidentiality of output data. Consider the impact of data outputs to other programs, external parties, etc.
  8. Design the interface between the user and the system application so that it is easy to use and self-documenting. Consider the impact of system-to-system interface design on infrastructure performance, including the capacity of personal computing devices and network bandwidth and availability.
  9. Reassess system design whenever significant technological and/or logical discrepancies occur during design, development and maintenance. Results of the reassessment should be subject to the normal approval cycle.
  10. Prepare and document detailed design specifications in accordance with organisational and industry-accepted specification standards and the information architecture.
  11. Conduct a design walk-through with IT and business stakeholders before development is initiated, as a part of the sign-off process for the design specifications. Various aids can be used to assist with the sign-off, including prototypes, to aid stakeholder understanding of the final design.

 

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Books
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Events & Online Learning: 9 total

7 May 2012
ISACA International Event
Orlando, Florida, USA
Get the knowledge you need to stay one step ahead of the competition and keep up with changing professional trends at ISACA’s North America CACS Conference.
12 Jun 2012
ISACA International Event
Dallas, Texas, USA
ISACA Training is a unique educational event designed to provide the tools you need to maintain, update and upgrade your skills, and to continue your professional development.
7 Aug 2012
ISACA International Event
Chicago, Illinois, USA
ISACA Training is a unique educational event designed to provide the tools you need to maintain, update and upgrade your skills, and to continue your professional development.
10 Sep 2012
ISACA International Event
Munich, Germany
Euro CACS/ISRM is a multidimensional event featuring audit, security, governance and risk content, and the audit and security programs, tools and the resources you need to be responsive to industry changes.
11 Sep 2012
ISACA International Event
San Francisco, California, USA
ISACA Training is a unique educational event designed to provide the tools you need to maintain, update and upgrade your skills, and to continue your professional development.

Journal Articles: 214 total

Volume 3, 2012
by Robert Findlay, CISA
Robert Findlay has had a 30-year career in a variety of IT roles, including computer operations, programming, project management, IT audit and emergency project management.
Volume 3, 2012
by Fabrizio Baiardi, Claudio Telmon, CISA, CISSP, and Daniele Sgandurra, Ph.D.
Haruspex is a risk evaluation methodology defined and implemented by the research group on risk management in the Department of Computer Science at the University of Pisa, Italy.
Volume 2, 2012
by John P. Pironti, CISA, CISM, CGEIT, CRISC, CISSP, ISSAP, ISSMP
Risk and security will no longer be something that the organization consciously considers and instead will become integrated in business-as-usual activities.
Volume 2, 2012
by Kerry A. Anderson, CISA, CISM, CRISC, CGEIT, CISSP, ISSMP, ISSAP, CSSLP, CFE
The closer alignment between RIM and information security may provide an approach to managing increasing data protection concerns and tough privacy regulations rather than maintaining the separation between these critical compliance functions.
Volume 2, 2012
by Gan Subramaniam, CISA, CISM, CCNA, CCSA, CIA, CISSP, ISO 27001 LA, SSCP
What should be the recovery strategy that I must impose on the vendor to ensure an effective recovery of the services, if a crisis were to ever occur?
Volume 2, 2012
by Charles Gold
While open-source technology offers significant benefits, using open-source components carries technical and business risks that cannot be ignored.

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Blog Posts: 93 total

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