What does System Analysis actually do?
- Performs quantitative assessments and estimations based on analyses
- Analyses use mainly:
–Quantitative Modeling Techniques,
–Analytical Models, and
–associated simulations, applied at varying levels of rigor and complexity depending on the level of fidelity needed.
- Obtain the necessary insight via a variety of analytic functions or experimentation
What types of analysis does System Analysis do?
- Cost Analysis,
- Affordability Analysis,
- Technical Risk Analysis,
- Technical risks should not be confused with project risks even if the method to manage them is the same. Technical risks address the system itself, not the project for its development.
- Feasibility Analysis,
- Effectiveness Analysis,
- Other quality characteristics.
What is sort of the endpoint of BMA (i.e. the outcome)?
You’ve gotten through problem space, solution space, and downselected to a set of preferred solution classes.
What are the major life cycle concepts?
- Acquisition
- Support
- Retirement
- Operations
- Deployment
What are characteristics of the BRS?
- Definition of the business framework within which stakeholders will define their requirements.
- So for a GSI project it would contain stuff about GSI’s organization and environment that would affect the project (see below)
- Business requirements govern the project, including agreement constraints, quality standards, and cost and schedule constraints.
What are the characteristics of a good requirements set?
- Complete
- Consistent
- Feasible/affordable
- Bounded
What’s the diff. between system architecture and system design?
Architecture
- Abstract, conceptualization oriented, global, focused to achieve the mission and OpsCon of the system
- Focused on high-level structure in systems and system elements
- Addresses the architectural principles, concepts, properties, and characteristics of the SOI
- Focussed on what
Design
- More technology oriented through physical, structural, environmental, and operational properties forcing decisions for implementation
- Focused on compatibility with technologies and other design elements and feasibility of construction and integration
- Focussed on how
What are the characterstics of a viewpoint?
- Addresses a particular stakeholder concern (or set of closely related concerns).
- Specifies the model kinds to be used in developing an architectural view that depicts how the architecture addresses that concern (or set of concerns).
- Specifies the ways in which the model(s) should be generated and how the models are used to compose the view.
What is end state of AD?
to generate system architecture alternatives, to select one or more alternative(s) that frame stakeholder concerns and meet system requirements, and to express this in a set of consistent views.
What are integration strategies/approaches?
- Top down
- Bottom up
- Integration with the stream
- Global
- Incremental
- Subset
- Criterion-driven
- Re-org of coupling matrices
What’s in a verification item?
- What must be verified (e.g., a requirement, a characteristic, or a property as reference),
- On which item (e.g., requirement, function, interface, system element, system),
- The expected result (deduced from the reference),
- The verification technique to apply (e.g., inspection, analysis, demonstration, test), and
- On which level of decomposition of the system (e.g., SOI, intermediate level system element, leaf level system element).
What are examples of verification actions?
- Verification of a stakeholder requirement or a system requirement
- Verification of the architecture of a system
- Verification of the design of a system element
- Verification of a system (product, service, or enterprise) or system element
What are other verification techniques beyond the big four?
- Analogy
- Sampling
- Simulation
What’s in a validation item?
- What must be validated (e.g., An operational scenario, a requirement, or a set of requirements as reference),
- On which item (e.g., Requirement, function, interface, system element, system),
- The expected result (deduced from the reference),
- The validation technique to apply (e.g., inspection, analysis, demonstration, test),
- On which level of the system hierarchy (e.g., SOI, intermediate level system element, leaf level system element).
What are examples of validation actions?
- Validation of a requirement
- Validation of an engineering artifact (architecture, design, etc.)
- Validation of a system (product, service, or enterprise)
What is acceptance?
- Acceptance is an activity conducted prior to transition such that the acquirer can decide that the system is ready to change ownership from supplier to acquirer.
- A set of operational validation actions is often exercised, or a review of validation results is systematically performed.
What is certification?
- Written assurance that the product or article has been developed, and can perform its assigned functions, in accordance with legal or industrial standards
- Basis for certification: development reviews, verification results, and validation results
- Typically performed by outside authorities, without direction as to how the requirements are to be verified.
What is operational validation?
Performing operational validation actions onto the complete system in its operational environment (context of use). This is compared to earlier-stage forms of validaiton where system isn’t complete or environment not available.
What are 2 mitigation techniques to deal with the performance cape gap in Maintenance?
- Performance-Based Logistics (PBL) approach (aka as Performance-Based Life Cycle Product Support)
- Technology Refreshment Programs (TRPs)
What are the major types of maintenance?
- Corrective
- Preventative
- System modifications
What are 3 common maintenance techniques?
- RCM
- Performance based product support (i.e. PBL)
- CBM
