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The next two chapters, and the cases in Part Two, explain various user experiences and inquiry patterns that software designers need to support to create useful products. Therefore, they need to build for the traits of complexity, striving to permit software users to carry out their inquiries in accordance with their contextually shaped goals. Software design teams play a large role in determining the technology constraints that problem solvers encounter. Įstablish resource monitoring and intercession supervision procedures by anticipating resource conflicts and deadlock situations.īARBARA MIREL, in Interaction Design for Complex Problem Solving, 2004 CONCLUSION: REVISITING MARTY AND THE SOFTWARE SUPPORT HE NEEDS.Predict task durations and determine task discreteness, concurrency, and synchronization tactics. īalance task duration and resource commitments.Monitor multitasking progress and adjust resource allocations to optimize task execution and termination. įlush tasks that are overtaken by events or may no longer be needed.Reorder the task queue based on priority. Īnticipate data processing needs and perform actions in advance, when possible.
Postpone low-priority data processing actions until computing resources are available. Īlert the user concerning the anticipated delay needed to respond to complicated requests.Respond initially by providing the most important information then disclosing additional information when it becomes available. Provide data processing progress indicators for actions taking a significant amount of time. Provide timely feedback concerning the requested action: The following guidelines are provided that address enhancing the software responsiveness to user-based requests 5 : 1. The software structural design must be evaluated to determine if the design can be enhanced to improve the software product’s responsiveness to requested actions. Software design responsiveness involves the timeliness of the software product’s response to user inputs, external interface stimuli, or interactions with elements of the computing environment. Threat modeling has become significantly more prominent in recent years given Microsoft’s highlighting its importance in their Security Development Lifecycle (SDL). This can be seen simply as a different type of use case, but the reason for calling out misuse case testing specifically is to highlight the general lack of considering attacks against the application.Ī more formal and commonly recognized way to consider negative security outcomes in software development is threat modeling. The idea of misuse case testing is to formally model, again most likely using UML, how security impact could be realized by an adversary abusing the application. Formal use cases are typically built as a flow diagram, written in UML (Unified Modeling Language), and are created to help model expected behavior and functionality. Use cases for applications spell out how various functionality is going to be leveraged within an application.
While security requirements might well be defined for an application in development, they are rarely required to achieve the desired goals for the application’s design.
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Software design has historically focused on developing code to provide desired or required functionality. Joshua Feldman, in CISSP Study Guide (Third Edition), 2016 Misuse Case Testing
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