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Tracking Risks
Tracking Cost Effects
Risk Assessment Model
Monte Carlo Analysis
@ Risk Front End |
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Tracking Risks
A risk is defined by the effects that will occur if it happens,
and the likelihood that it will happen.
A single risk can have multiple effects. Risk effects can usually
be classified into a few common areas that are of significance to
your organization. Cost or schedule or both are usually significant,
and other areas might relate, for example, to client satisfaction,
or health and safety, or product reliability.
RIAS allows you to track cost and schedule effects and up to four
additional areas which you can specify. Each risk effect that you
elect to track can have its own user-definable scale, and each risk
effect for each risk can be assigned a numerical rating. The individual
ratings determine the overall risk impact.
Risk likelihood is also assigned a numerical value. Impact and likelihood
together enable the level of severity of each risk to be unambiguously
defined and tracked. |
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Tracking Cost Effects
RIAS tracks the cost effect of each risk in terms of an estimated
cost increase (or decrease) that could occur, and a variance around
that amount to represent the uncertainty in the estimate. (When
you expect a cost increase of $50,000, do you mean exactly $50,000,
or just somewhere roughly in that vicinity?)
Cost effects can be tracked without reference to time, or can be
tracked as a variable over multiple time periods. RIAS allows you
to define up to 16 separate cost reporting periods, which can be
calendar periods or user-definable periods such as Phase 1, Phase
2, etc. Costs and cost variances can be defined individually for
each risk in each period.
Risks can represent opportunities as well as threats. (If we
do this now it will increase costs in the short term but will bring
savings in the long term.) The multiple cost periods facility
allows you to track the expected increases and savings over time,
together with the uncertainties associated with them. |
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Risk Assessment Model
RIAS uses a risk assessment model based on the Project Management
Institute’s publication A Guide to the Project Management
Body of Knowledge, 2000 edition. Details of the RIAS implementation
can be found in “Qualitative Risk Assessment”, PM
Network, Oct 2000, pp. 61-66.
The RIAS risk assessment process begins with the selection of up
to six risk effect areas, i.e. areas of significance to the organization
which could be impacted by the occurrence of a risk. Assessment
scales are set up for these areas so that predicted risk effects
can be assigned numerical impact ratings for each risk effect area.
Overall impact is determined by combining the individual impacts
in each area. Weighting can be applied if some areas are considered
to have greater significance than others.
Likelihood is determined both by the probability of a risk occurring
if no action is taken to deal with it, and intervention difficulty,
i.e. the level of difficulty that would be experienced in attempting
to prevent the risk occurring. However, for compatibility with some
older conventions you can elect to use probability only. |
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Monte Carlo Analysis
Monte Carlo analysis is a method of predicting overall costs, taking
into account the uncertainty that may be associated with the individual
cost estimates. It does this by looking at a randomly selected sample
of possible cost outcomes, using a description, or model, of the
uncertainty associated with each cost element. But herein lies the
problem: how do you know what is an appropriate uncertainty model,
and how do you apply it?
RIAS solves this problem for you by phrasing questions in simple
descriptive terms, and converting your answers to Monte Carlo models
(you tell RIAS what to do and RIAS does the math). Both open and
closed models are available. (Ref. “Open and Closed: The
Monte Carlo Model”, PM Network, pp. 48-52, Dec 2001)
Note: RIAS does not provide a Monte Carlo
engine. To make use of the RIAS Monte Carlo facility you must have
Palisade Corporation’s @Risk software installed on your system.
However, what RIAS does for you is to automate the process of setting
up the analysis model, which typically accounts for the bulk of
the work involved in Monte Carlo analysis. |
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@Risk Front End
RIAS provides a user-friendly front end to Palisade Corporation’s
@Risk for Excel Monte Carlo engine, by automatically generating
@Risk formulas.
Monte Carlo is a powerful tool for budget analysis, providing answers
such as the probability of overrunning a budget, or the amount of
contingency needed for a given probability of completing the work
within budget, or the probable effect on your budget of a poorly-defined
task. @Risk is an excellent tool for this purpose. However,
it requires special formulas to be generated and inserted into budget
spreadsheets, which can demand considerable statistical and mathematical
knowledge.
The RIAS Monte Carlo module provides this know-how for you, automatically
generating and inserting the required formulas. (Some of these formulas
are almost impossible to generate without RIAS.) With RIAS you can
set up and perform expert-level simulations on risk cost data and
on standard budget data. |
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| To learn more about RIAS Software contact admin@davion.com
or give us a call at 1-888-420-4559. |
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