Guide - Section 2.7 (Deck#3) - Measurement Performance Flashcards
WHAT TO MEASURE: Deliverable Metrics, Delivery
Name 3 customary measures or categories of metrics that describe Deliverables?
- Errors or defects - # identified, fixed
- Performance - reliability, size, accuracy, weight
- Technical Performance - meet specs?
This measure includes the source of defects, number of defects identified, and number of defects resolved.
Information on errors and defects
These measures characterize physical or functional attributes relating to the system operation.
Measures of performance
Size, weight, capacity, accuracy, reliability, efficiency, and similar performance measures are examples of what measure?
Measures of performance
These quantifiable measures of technical performance are
used to ensure system components meet technical requirements.
Technical performance measures
What provide insights into progress in achieving the technical solution?
Technical performance measures
The ability of the system or its components to perform their intended function under specified conditions for a specified period of time is called?
Reliability
The ratio of output to input, such as the amount of work accomplished per unit of time or per unit of energy consumed is called?
Efficiency
The degree to which the system or its components conform to a standard or specification is called?
Accuracy
The maximum amount of work that can be performed by the system or its components is called?
Capacity
What measurements are associated with work in progress and are frequently
used in projects using adaptive approaches?
Delivery Measurements
This measure indicates the number of work items that are being worked on at any given time. It is used to help the project team limit the number of items in progress to a manageable size.
Work in Progress
This measure indicates the amount of elapsed time from a story or chunk of work entering the backlog to the end of the iteration or the release.
Lead Time
What does a lower lead time indicate?
Lower lead time indicates a more effective process and a more productive project team.
What indicates the amount of time it takes the project team to complete a task?
Cycle Time
Shorter cycle times indicate
A more productive project team.
What does a consistent cycle time indicate?
A consistent time helps predict the possible rate of work in the future.
What measure tracks the number of items in a queue?
Queue Size
What can the queue size be compared to?
the work in progress limit
What states that when a system is running at maximum capacity, adding more work onto the system only slows it down?
Little’s Law
Work in Progress = Cycle Time X Throughput
More formally, Little’s Law states that cycle time equals work in progress divided by the system’s throughput.
What is used to help understand the relationship between work in progress, cycle time, and throughput?
Little’s Law
The rate at which work items are completed by the system.
Throughput
What is used to help identify bottlenecks in a system and to optimize the flow of work through the system?
Little’s Law
If the work in progress is high and the cycle time is also high, it may indicate that…
there are bottlenecks in the system that are slowing down the flow of work
If the work in progress is high and the throughput is low, it may indicate that…
there are capacity constraints in the system that are preventing work from being completed at a faster rate.
If the cycle time is high and the throughput is low, it may indicate that…
there are inefficiencies in the process that are slowing down the completion of work.
What measures the estimated amount of work (level of effort, story points, etc.) that is expected to be completed in an iteration?
Batch Size
What is a ratio used in lean systems to optimize the flow of work. This measure calculates the ratio between value-adding time and non-value-adding activities.
Process efficiency
PE = Value Adding Time (VAT) / (VAT+NVAT)
Higher ratios of process efficiency indicate?
A more efficient process
By measuring and improving process efficiency, organizations can optimize…
the flow of work and reduce waste, which can lead to improved productivity and customer satisfaction.
Tasks that are waiting increase the…
Non-Value Add Time
tasks that are in development or in verification represent
Value Add Time
