Problem Detection and reolution (10%)

Question 1

how problems impact a project

Answer 1

diagnosing takes time that causes delays

changing allready dine work also does

small problem can lead to long delay this way

Question 2

the cost of change

agile promotes frequent communication with the stakeholders in order to keep these costs low

Answer 2

the longer a bug will be unaddressed the more expensive it will be to fix it

• cause more work will have to be undone to fix it
• more stakeholders will be involved

Question 3

technical debt

Answer 3

technical dent is a backlog of work not done in cleaning up the code in order to deliver faster

we need constant refactoring to reduce technical debt

Question 4

create a safe and open environment

Answer 4

similar to agile leadership and agile teams agile focuses on creating a safe and open environment also helps in the problem solving domain.

allow people to communicate the problems before they pop up at a late stage

Question 5

lead time

cycle time

Answer 5

lead time (to do to done)
measures how long something takes to go through the entire process

cycle time (e.g. from doing to done)
measures how long takes to go through part of the process 

cycle time = WIP | Throughput
KNOW THIS FORMULA !!!

throughput = amount of work than can be processed in a system i.mn a given time

knowing the cycle time allows to make commitments to the customer when the work will be done

excessive wip is associated with a number of problems:

1. hides bottlenecks
2. carries the risk of potential rework

agile focuses on reducing cycle time

throughput: average amount of work a team can get done in a time period
(might also be due to a new person)
productivity: rate of efficiency that the work is done

Question 6

defects
defects cycle time
defect rate

Answer 6

defects cost money
that is why defect cycle time is of importance

some teams measure it to keep costs low

defect rates
measures rate of defects that made it to the final product without being detected

Question 7

variance analysis

Answer 7

when evaluating performance or results there will always be a certain amount of variance due to normal fluctuation. some variation is normal - do not be fooled by that.

causes of variation
accept common cause of variation and work against special causes of variations

check daily for example to detect special causes of variance

Question 8

trend analysis

Answer 8

statistics that look into the future are more interesting than stats that report the past.

the interesting info is the trend not the actual number (of defects for example)

Question 9

control limits

Answer 9

upper and lower limits help to determine the acceptable variation

how many points per month do we need to work ?

how many people should be in a scrum team?

wip is also a control limit

Question 10

risk adjusted backlog

Answer 10

business value high
risk = anti value> priorities them lower
that is a risk adjusted backlog

this allows agile teams to focus on value production and risk avoidance

risk burndown graph

Question 11

problem solving

as continuous improvement

Answer 11

engage the team

• consensus for the proposal
• broader knowledge base
• practical
• involved people work hard
• asking for help shows confidence