Environmental Engineering Reference
In-Depth Information
tABle 10.1
change Analysis Worksheet
change Factor
difference/change
effect
questions to Answer
What
(Conditions,.occurrence,.
activity,.equipment)
When
(occurred,.identiied,.
plant.status,.schedule)
Where
(physical.location,.
environmental.
conditions)
How
(work.practice,.
omission,.extraneous.
action,.out-of-sequence.
procedure)
Who
(personnel.involved,.
training,.qualiication,.
supervision)
Source:
. Courtesy.of.the.United.States.Department.of.Energy.
Change.analysis.is.a.good.technique.to.use.whenever.the.causes.of.the.condition.
are.obscure,.you.do.not.know.where.to.start,.or.you.suspect.a.change.may.have.con-
tributed.to.the.condition..Not.recognizing.the.compounding.of.change.(e.g.,.a.change.
made. ive. years. previously. combined. with. a. change. made. recently). is. a. potential.
shortcoming.of.change.analysis..Not.recognizing.the.introduction.of.gradual.change.
as.compared.with.immediate.change.also.is.possible..This.technique.may.be.adequate.
to.determine.the.root.cause.of.a.relatively.simple.condition..In.general,.however,.it.is.
not.thorough.enough.to.determine.all.the.causes.of.more.complex.conditions.
structurIng the AnAlysIs
Change. analysis. involves. six. steps.. These. steps. are. presented. in. the. worksheet. in.
Table 10.1..The.following.questions.will.help.you.complete.the.six.steps.and.identify.
information.required.on.the.worksheet:
.
1.. WHAT?
.
a..
What.is.the.condition?
.
b..
What.occurred.to.create.the.condition?
.
c..
What.occurred.prior.to.the.condition?
