Markov Quick Calculation Pad
BlockSim includes a Quick Calculation Pad (QCP) for computing
useful metrics. You can access the QCP by choosing
Analysis > Analysis > Analytical
QCP or by clicking its icon on the Analytical page of the
diagram control panel.
To perform a calculation, select the appropriate option and
enter any required inputs in the Input
area, then click Calculate.
For more detailed information on how to use the QCP in general,
see Quick Calculation
Pad (QCP).
The following calculations are available for discrete Markov
diagrams:
Point
Probability
Calculates the probability of the
system being in a given state at a given step. Enter the step
at which you wish to calculate the point probability in the
Mission End Time field
and choose the state of interest in the State
field.
Point
Probability Complement
Calculates the probability of the
system not being in a given state at a given step. Enter the
step at which you wish to calculate the point probability
complement in the Mission
End Time field and choose the state of interest in
the State field.
Mean
Probability
Calculates the overall mean probability
of the system being in a given state during the entire analysis.
Choose the state of interest in the State
field.
Steps
Spent in State
Calculates the overall number of steps
that the system spends in a given state during the entire
analysis (mean probability * number of steps in the analysis).
Choose the state of interest in the State
field.
The following calculations are available for continuous Markov
diagrams:
Point
Availability
Calculates the probability that the
system will be in an available state at a certain point in
time, when return from unavailable states is considered. Enter
the time at which you wish to calculate the point availability
in the Mission End Time
field. The mission is assumed to start at time = 0.
Point
Unavailability
Calculates the probability that the
system will be in an unavailable state at a certain point
in time. Enter the time at which you wish to calculate the
point unavailability in the Mission
End Time field. The mission is assumed to start at
time = 0.
The point unavailability is the inverse
of the point availability. For example, a 10% point unavailability
is equivalent to a 90% point availability.
Point
Reliability
Calculates the probability that the
system will be in an available state, without ever having
entered an unavailable state, at a certain point in time.
Enter the time at which you wish to calculate the point reliability
in the Mission End Time
field. The mission is assumed to start at time = 0.
Point
Prob. of Failure
Calculates the probability that the
system has at some point entered an unavailable state by a
certain point in time. Enter the time at which you wish to
calculate the probability of failure in the Mission
End Time field. The mission is assumed to start at
time = 0.
Probability of failure is also known
as unreliability and it is the complement of the reliability.
For example, a point probability of failure of 10% for a mission
end time of 3 years is equivalent to a 90% reliability.
Point
Probability (Av)
Calculates the probability that the
system will be in a given state at a given time, when return
from unavailable states is considered. Enter the time at which
you wish to calculate the probability in the Mission
End Time field. The mission is assumed to start at
time = 0. Choose the state of interest in the State
field.
1
- Point Probability (Av)
Calculates the probability that the
system will not be in a given state at a given time, when
return from unavailable states is considered. Enter the time
at which you wish to calculate the probability in the Mission End Time field.
The mission is assumed to start at time = 0. Choose the state
of interest in the State
field.
Point
Probability (Rel)
Calculates the probability that the
system will be in a given state at a given time, when return
from unavailable states is ignored. Enter the time at which
you wish to calculate the point availability in the Mission End Time field.
The mission is assumed to start at time = 0. Choose the state
of interest in the State
field.
1
- Point Probability (Rel)
Calculates the probability that the
system will not be in a given state at a given time, when
return from unavailable states is ignored. Enter the time
at which you wish to calculate the probability in the Mission End Time field.
The mission is assumed to start at time = 0. Choose the state
of interest in the State
field.