What is a Stage-Gate Model?
▪ Each development phase (stage) is followed by a review (gate) to test whether the phase is completed
▪ Good for known requirements, products, technologies, and markets, e.g., next generation smart phone
What are the two ways to interpret requirement in a top-down development?
One-by-one (easier to process) vs. all-at-once (full picture, better solution)
What are the benefits of Stage-Gate Models? Name 3.
▪ Simple and linear
▪ Easy to plan with, easy to understand and participate
▪ Gates provide simple control mechanisms for project management, provides unambiguous project status
▪ Front loading: Strong focus on task clarification and requirement formulation
What are the limitations of Stage-Gate Models? Name 3.
▪ Relies on a comprehensive set of requirements (difficult to establish)
▪ Difficult to react to changing requirements (→ VUCA)
▪ Deviations from the intended plan are not accounted for (but necessary)
▪ Established models are not specific about how to develop concepts / solution ideas
▪ Limited information about feasibility, no learning from prototype
What is the general V-Model?
Development procedure model for:
− Integration of different disciplines
− High complexity (interaction of components)
− Well-understood requirements
What are the benefits of the V-Model? Name 3.
▪ Accounts for partially incomplete requirements
▪ Focus on the integration of different disciplines
▪ Provides structure for large design projects
▪ Supportive for problem identification and troubleshooting
▪ Supportive for learning from testing and documentation
What are the limitations of the V-Model? Name 3.
▪ Iteration in conflict with time schedules → Not adequate for short-term projects
▪ Not specific about how to derive requirements quantitatively
▪ Not specific about resolving conflicts of goals
▪ Limited information about feasibility (in a pure top-down
setting)
Solution Space Engineering - definition
Solution Space Engineering is a quantitative concretization of the V-Model
For what technical products is Solution Space Engineering applicable?
Is applicable to technical products
−With known quantities of interest and
−With known design variables and
−With known simulation models
What is the procedure for Solution Space Engineering?
Frame
▪ Elicit requirements
▪ Identify QoIs and DVs
▪ Identify dependencies
▪ Define scope
->Outcome: ADG
Model
▪ Implement means of assessment = simulation model or surrogate model or test procedure
->Outcome: Bottom-up mappings
Design
▪ Seek sets of solutions = solution space or
▪ Define solution
->Outcome: Component requirements
What is an additional benefit of Solution Space Engineering?
▪ Quantitative requirements → objective and transparent
What is an additional limitation of Solution Space Engineering?
▪ Efforts for ADGs and quantitative models
What are the characteristics of Agile Developement?
▪ Agile is an iterative and incremental development approach, delivering results in small, better manageable steps.
▪ Requirements are expected to evolve over time, and change is treated as normal, not as a failure.
▪ Work is organized in short cycles, e.g. sprints, with regular review and adaptation.
What are the two dimensions of the Stacey Matrix and what is it used for?
▪ Indeterminacy of expectation = degree to which the success metric is unknown
▪ Technical complexity = level of difficulty to solve a problem with available means
▪ For classification of projects into simple, complicated, complex, chaotic and recommendation of development approach
