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END4400 System Dynamics Week 1 Quiz

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Questions and Answers

What do descriptive models aim to represent?

The optimal decision to maximize an objective function

How a system should function to eliminate problems

The constraints that must be satisfied in a system

How variables interact and how problems are generated (correct)

Which statement about system dynamics (SD) models is correct?

SD models are descriptive in nature (correct)

SD models can only represent discrete dynamics

SD models are prescriptive in nature

SD models can only represent continuous dynamics

What is the difference between continuous and discrete dynamics in models?

Continuous dynamics can change at any time, while discrete dynamics change at pre-defined points in time (correct)

Continuous dynamics change at pre-defined points in time, while discrete dynamics can change at any time

Continuous dynamics represent variables that change over time, while discrete dynamics represent static variables

There is no difference between continuous and discrete dynamics in models

Which type of equations are used to represent continuous-time models?

Differential or integral equations Signup and view all the answers

What is an example of a variable that exhibits continuous dynamics?

Air temperature Signup and view all the answers

Which type of models aim to find the 'optimum' decision under a set of constraints?

Prescriptive models Signup and view all the answers

What is an example of a variable that exhibits discrete dynamics?

GPA of a student Signup and view all the answers

Which statement about system dynamics (SD) models and time horizons is correct?

If the time horizon is long enough, SD models can assume time-continuity Signup and view all the answers

Which type of models represent how variables interact and how problems are generated, but do not provide solutions?

Descriptive models Signup and view all the answers

What type of equations are used to represent discrete-time models?

Difference equations Signup and view all the answers