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DISASTER
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RISK
ASSESSMENT
Understanding
and Communicating Risk Assessment
By HENRY KALT
You have spent dozens of
hours with your team listing the events that might cause a disaster
or financial ruin at your company. You have identified the possible
impacts through a business impact analysis. Thorough and detailed, you
have lots of valuable information.
But what does it all mean? And how do you present all this great information
to senior management? How do you present risk in such a way so as to
retain your credibility (i.e. not be perceived as crying out, “The
sky is falling”)?
The purpose of this article will be to detail a method of organizing
your information in an easy to understand format that goes to the heart
of the matter. We will begin by applying the model to operational risk.
However, we will expand the model to encompass two other types of risk:
competitive and financial.
Impact and Probability
The two key variables of risk assessment are impact and probability.
Once a specific threat has been identified, say a power outage, what
are the impact and probability of this event?
The question is always relative to your particular institution, since
probability and impact will vary according to your location and your
operations. For example, in some parts of the world, a power outage
is a common occurrence; whereas in others, it is infrequent. For some
businesses, even a momentary power outage can mean disaster, whereas
for others, a few days are not a problem. The ultimate impact –
that is, the dollars lost – is relative to the size of your organization.
Ultimately, risk can be understood to fall into one of four possible
quadrants: 1) low probability – low impact; 2) high probability
– low impact; 3) low probability – high impact; and 4) high
probability – high impact.
Graphing these quadrants helps to visualize the possible effect of a
risk. The scales, though, are relative to your institution. Depending
upon your situation, you may wish to size the quadrants or scales differently
(see Figure 1).

Quantifying your risk is the first step. You must first determine the
probability of an event, such as power outage based upon past history.
If you have not been tracking this information, this may prove difficult
and you may have to contact your local utility company. You can calculate
the probability of major weather events using the information that can
be found on the FEMA Web site (www.fema.org).
Each probability has to be within some delimited time period that is
reasonable. Just about anything can happen if you give it enough time!
A rule of thumb is between one and five years. But it depends on the
particular risk.
In the geographical area of my company, there have been five hurricanes
that have been direct strikes in the last century. The last one was
in 1986. As we get further from that date, the probability gets higher.
Hence in my risk assessment of hurricanes for my company, I adjusted
the time frame accordingly.
The second aspect of quantifying risk is determining impact. If you
have done a business impact assessment, you already have good information
to work from. On the other hand, some risks may not impact your entire
business, or they may impact intangible aspects of your business. However,
if you have had any crises, you will have something to work from for
assessing impact.
You can adjust the impact scale to reflect your company’s risk
tolerance. By setting the high end of the scale to a relatively low
figure in terms of the potential impact of an event, you reflect what
you believe the company can absorb in terms of loss compared to the
actual revenue loss that would accompany a disaster.
Thus, probability represents an absolute scale of potential empirical
events while the impact scale is relative to the risk tolerance of the
management, or the ability of a company to absorb a loss.
Mapping Risk: The Quadrants and Their Options
Any threat can be mapped into this risk assessment tool. Once a threat
is identified and mapped, you have assessed the risk. The next question
is, having assessed the risk, what does this mean for your company.
For the most part, businesses will ignore the low probability –
low impact quadrant. The remaining three quadrants fall out into predictable
categories.
High Probability – Low Impact: These are the types of things,
somewhat like losing a light bulb, that are predictable – almost
standard. You know they are going to happen and as such, procedures
for dealing with them should be documented. Since there is little impact,
the only worry is that the failure might, over time, have a cascade
affect elsewhere.
High Probability – High Impact: These are events for which you
truly ought to mitigate, for example, the loss of a CPU or critical
disk drive. The drive should be mirrored and the CPU should be a part
of a cluster. Or, if you live in Tampa, Fla., where there is a very
high incidence of lightning, you will want to have lightning protection.
It should be noted that, if a company’s risk tolerance were low,
more threats would fall into this risk profile.
Low Probability – High Impact: These are the events for which
you plan and test. They aren’t too likely to happen, but you need
to be ready because of the potential impact.
Mapping Risk: Additional Types
So far, we have merely focused upon mapping basic operational risk types.
There are essentially events that derive from nature or the day-to-day
operations of a data center. However, this model and its methodology
can be easily adapted to additional types of risk. We start with competitive
risk.
As with operational risk, businesses will ignore the low probability
– low impact quadrant for competitive risk. The remaining three
quadrants fall out into predictable categories.
High Probability – Low Impact: These are the types of competitive
risk that are predictable – almost standard. Competitors will
continue to improve their products; competitors will try to undercut
your products and services based upon price. As such, events or possible
events with this risk profile should be dealt with through the continuous
improvement of products/prices and services
High Probability – High Impact: Competitors will come out with
new products and services. As such, companies must meet such threats
with their own new products and services or have a strategy as such.
If a company is very large and the products in that market are simple,
they can wait for others to develop products and then simply imitate.
For example, Coca Cola recently came out with a new product of lemon
flavored Diet Coke. Within a matter of months Pepsi came out with the
same thing.
Low Probability – High Impact: These are the events for which
we must have strategic plans – disruptive technologies or hostile
take-overs. They aren’t too likely to happen, but you need to
be ready because of the potential impact.
Another type of risk is financial. As
with operational risk, businesses will ignore the low probability –
low impact quadrant for financial risk. The remaining three quadrants
fall out into predictable categories of risk management instruments.
High Probability – Low Impact: These are the types of financial
risk that are predictable. There are economic cycles and companies need
reserves to weather these cycles. They may be relative to the specific
type of market in which you have products or services, or they may be
global. But, there are always economic downturns. As such, events with
this risk profile should be dealt with through reserves or a “rainy
day” fund.
High Probability – High Impact: These are investment risks which
have a high rate of return but also engender high risk. Hence, one should
have re-insurance or re-insurance instruments for such risk. Citigroup
sold a re-insurance device to mitigate the risk of investing in Enron.
These were bonds that paid a rate of return less than the investment
return of Citigroup’s investment in Enron. As long as Enron was
solvent, the bonds paid off, but when it collapsed the bonds stopped
paying. This mitigated Citigroup’s risk in their Enron investment.
Re-insurance is another device for mitigating such risks when a company
sells life insurance for example. It should be noted that, if a company’s
risk tolerance were low, more threats would fall into this risk profile.
Low Probability – High Impact: These are the events for which
you have insurance, such as business interruption insurance, or re-insurance
if your product is insurance. Poor actuarial experience is unlikely,
but you need to be ready because of the potential impact.
Mapping Risk: Assigning Control
Categories to Each Quadrant
Another advantage of presenting risk in this quadrant format is that
it lends itself to a simple categorization of controls (see Figure 2).

High Probability – Low Impact: Risks that fall into this quadrant
will have to be dealt with frequently and therefore should be a part
of normal operations. Such threats should not impact daily operations
– daily operations should anticipate and react to these events
as a part of their normal jobs.
High Probability – High Impact: Unquestionably any threat that
falls into this category should be mitigated. This may mean additional
hardware or software, changes in back-up strategies or other tactical
implementations. This is where your budget dollars should be spent.
Low Probability – High Impact: These are risks that, while not
likely, would have a severe impact. This is exception processing. These
are risks your organization should be prepared for through planning.
Since they are unlikely, you may not want to necessarily mitigate through
extensive physical controls – such as an additional “mirrored”
data center. The cost simply does not justify the perceived benefit
since the probability is low.
Low Probability – Low Impact: Don’t worry about it! And
don’t bother listing such risks either since you will be wasting
the time of your superiors.
Summary
There are a number of key variables that will be determined by the specific
location, economics, psychology and business context of an institution
with respect to a risk assessment of the potential threats to that institution.
Working through the risk assessment process in a systematic manner will
not only reveal risks but suggest ways of managing those risks as well.
Henry Kalt is the director of business continuity and disaster recovery
for Oxford Health Plans, Inc. He has published articles in a variety of
areas including hermeneutics and psychoeuroimmunology. He can be reached
at hkalt@oxhp.com.
To comment on this article, go to 1603-16 at www.drj.com/feedback.
©Copyright
2003 Systems Support Inc. All rights reserved. Reproduction in whole
or in part in any form or medium without the express written permission
of System Support Inc. is prohibited.
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