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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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Events & Online Learning: 12 total

Journal Articles: 246 total

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Volume 3, 2018
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Volume 3, 2018
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One of the major challenges chief information security officers (CISOs) face in almost any organization is prioritizing information security interests with regard to IT interests.
Volume 3, 2018
by Alex Quiles, CISA
The use of Windows accounts to authorize users to applications introduces risk that an auditor should evaluate.
Volume 3, 2018
by Kevin Alvero, CFE, Randy Pierson, CISA, and Wade Cassels, CISA, CIA, CFE, CRMA
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Wikis: 2 total

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