Environmental Engineering Reference
In-Depth Information
tABle 4.6
resultant effect of Impact (reI) values
reI
Worker
Property
Productivity
economic
Very.High.-.5
Death
Total.loss
Down.longer.than.a.
week
≥$10,000
High.-.4
Critical.or.severe
Major.repairs
Down.less.than.a.
week
<$10,000
Medium.-.3
Medical.treatment
Minor.repairs.to.
operate
Down.less.than.
2 days
<$1,000
Low.-.2
First.aid
Cosmetic.repairs
Down.for.a.shift
A.few.hundred.$
Very.Low.-.1
No.injury.or.illness
No.damage
No.downtime
No.monetary.loss
Second,. determine. the. impacts. on. the. workplace. and. those. workers. present..
In. the. work. environment,. the. impact. on. a. worker. is. the. most. important.. From. an.
.occupational. perspective. the. impact. upon. machinery. and. equipment. is. of. lesser.
importance.while.the.least.important.is.the.impact.upon.productivity.and.economics.
(monetary.lose)..Place.a.numeric.weighting.IP.value.for.each.impact;.the.four.factors.
in.order.of.most.important.to.least.important.should.be.weighted.as.follows:
•.
Worker.(W).-.4
•.
Property.(Prop).-.3
•.
Productivity.(Prod).-.2
•.
Economic.(Eco).-.1
The. above. scale. constitutes. the. weighting. factor. (IWF). for. each. impact. (i.e.,. the.
multiplier.for.the.resultant.effect.of.each.impact)..The.resultant.effect.of.the.impact.
value.(REI).is.determined.using.Table 4.6.
An. REI. value. for. each. impact. should. be. determined. and. multiplied. by. the. IP.
value.for.that.impact..The.product.of.each.of.the.four.is.added.together.to.determine.
IMPACT.(IMP)..The.IMP.is.then.added.to.the.product.of.P.and.OS..Thus,.the.Risk.
Assessment.Value.(RAV).allows.for.ranking.the.hazard..The.higher.the.score,.the.
higher.the.risk..The.highest.risk.assessment.value.would.be.70.(Highest.Risk).to.a.
low.of.11.(No.Risk)..Ranking.risk.is.not.an.exact.science.but.it.is.an.approximation.
of.the.potential.risk..A.summary.formula.for.the.RAV.is
.
RAV.=.P.×.OS.+.IWF
W.
×.REI
W.
+.IWF
Prop.
×.REI
Prop.
+.IWF
Prod
.×.REI
Prod
+.IWF
Eco
.×.REI
Eco
.
hAzArd And cost AvoIdAnce
At. times,. even. using. the. preceding. risk. assessment. and. cost. justiication. models.
(refer.to.Chapter.1).does.not.ind.acceptance.when.trying.to.convince.others.of.the.
