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					                                                                                                                                         Importance
                                                                                                                 Likelihood

                                                                                                                              Severity
ID           Risk Item                           Effect                                 Cause


                                   What is the effect on any or all of
                                                                          What are the possible cause(s) of
      Describe the risk briefly     the project deliverables if the                                                                      L*S
                                                                                      this risk?
                                      cause actually happens?


1          TEG overheat                   Total System Failure             Inadequate heat transfer control        2           3          6


2     Insufficient TEG cooling         Unsustainable operation                Heating up of TEG cold side          2           2          4
                                                                          Poor time management/ change in
3          TEG lead time                Underpowered system                                                        1           2          2
                                                                                      design
4 Battery failure/destruction             Total system failure            Poor battery sizing, excessive heat      2           3          6

                                   Over acceptable/affordable value
5          Product Cost                                                       Excessive component cost             2           2          4
                                             for Haitians

                                                                            Inaccurate pricing of materials,
6         Project Budget                      Over budget                                                          1           2          2
                                                                              inefficient use of materials




7       Component melting                    System failure                Excessive heating to components         2           2          4




                                                                          Poor vendor selection, inadequete
8           Lead times                 Over budget/Late delivery                                                   2           2          4
                                                                                      research

                                   Fan won't start immediately. Aux. Poor battery sizing, too little current
9     Battery doesn’t charge                                                                                       2           2          4
                                        device won't charge.           to battery, battery malfunction
     Insufficient power for aux.
10                                    Aux. device does not charge          TEG produces insufficient power         2           2          4
                device

                                   Forced induction to fire may fail     Insufficient transient heat trasfer
11      Transient modeling         at start-up or battery will be        modeling. Insufficient energy storage     3           2          6
                                   drained                               capabilities

                                                                          Battery too small and doesn't hold
                                   Fan won't start immediately. Aux.
12       Battery is drained                                                   charge well. Excessive user          3           1          3
                                        device won't charge.
                                                                                      interaction


   Insufficiently connects to
13                            Failure to meet CN 9,10. Possible                                                    2           2          4
              stove
                              damage to unit.                   Poor design planning
    Unable to maintain max
14                              TEG capabilities not optimized    Transient effect on components                   2           2          4
         TEG efficiency
15 Fan produces low flow rate          Inadequete system                   Inaccurate sizing or analysis      1   2   2

                                                                           Inadequate analysis of stove
       Heat conduction rod        Possible loss of heat trasfer to
16                                                                     operating temperatures and material    2   3   6
             melting                      thermoelectric
                                                                                    properties

      Heat conduction rod            Possible overheating of
17   conducts too much/not         thermoelectric/ Insufficient         Inadequate heat transfer analysis     2   3   6
         enough heat                   power generation

                                                                       Inadequate transient heat transfer
   Rod takes too long to heat    Improper system function. Fan         analysis. Inadequate understanding
18                                                                                                            2   2   4
               up                 may not operate at start-up             of transient temperatures in
                                                                              combistion chamber.
                                                                        Unable to meet required ∆T or
      TEG power producing
19                                   Underpowered system                 TEG incapable of producing           1   3   3
        capacity too small
                                                                               required power
      Inability to accurately                                           TEG model changes as heat is
20                              Optimal power not being used                                                  2   2   4
            model TEG                                                       consistently applied

      Electrical components                                            Excessive heating to components.
21                                       System Failure                                                       2   3   6
           fail/overheat                                                     Complicated design.


                                                                        Inability to turn off power to unit
22   Aux device overheats           Damage to aux. device                                                     2   1   2
                                                                       being charged when fully charged
       Fan produces
23  insufficient pressure
             drop
   Fan requires too much
24
            power
25        Fan melts
26 Fan lifespan too short
                                                                          Complex components, exotic
      Inadequte means to         Failure to provide prototype for        manufacturing methods (CNC),
27                                                                                                            2   3   6
       prototype (tooling)      testing. Failure to deliver product.    insufficient thought given to lead
                                                                                       times.
      Casing conducts too
28
          much heat
     Faulty design of control                                          Components not sized properly or
29                                       System failure                                                       2   3   6
             system                                                    break due to overheating from fire
       Action to Minimize Risk                  Owner


                                           Who is responsible
 What action(s) will you take (and by
                                             for following
when) to prevent, reduce the impact of,
                                              through on
 or transfer the risk of this occurring?
                                              mitigation?

 In-depth heat transfer including FEM,
                                                  Jeff
                testing
 In-depth heat transfer including FEM,
                                                 Brad
                testing
 Early analysis of power consumption             Jared
Proper battery sizing, means to bypass
                                                 Fahad
               battery

         Design based on cost                    Jared

 Check pricing against other sources,
   approve plans before material                 Jared
             fabrication



     Insulated design for sensitive
                                               Tom/Jeff
             components



 Secure correct shipping times/Plan for
                                                 Jared
         additional shipping time
     Size the battery more acurately
  through better testing. Allow TEG to           Fahad
            charge aux device.
  Produce design with minimal power
                                                  Tom
               consumption
Rigoruous transient heat transfer
analysis. Careful selection of heat
transfer method and materials. Testing         Brad/Tom
of stove (transient temps)
   Test battery many times to ensure
   charge is held. Incorporate an LED
                                                 Fahad
warning system to tell user that battery
                is drained.

Decide on robust design early in design
process and test design. Tests should            Brad
include durability testing.

      In depth analysis / Testing              Tom/Jeff
 Check analysis of flow rate from stove
                                              Jared
team, "size" fan for slightly higher flow

Analyze stove operating temperatures.
                                              Brad
    Carefuly select material to suit

  Complete analysis of heat trasnfer
 characterisitcs of rod/block. Average
                                              Brad
 stove operating temperatures taken
          into consideration

   Test stove to get understanding of
    transient temperatures. Model
                                              Brad
 transient temperature characteristics
                 of rod.

     Design with minimal power
                                             Jeff/Tom
           consumption

     In depth analysis / Testing             Jeff/Tom
  Keep components insulated and
distant from heat. Simplify design to
                                              Fahad
incorporate as little components as
              possible

 Unplug device when fully charged             Tom


                                              Jared


                                              Jared
                                              Jared
                                              Jared
Consider means of production when in
 design process. Plan ahead for lead          Brad
               times.

                                               Jeff

Design system in insulated location /
                                            Tom/Fahad
    In depth analysis of design
Likelihood scale




1 - This cause is unlikely to happen



2 - This cause could conceivably happen


3 - This cause is very likely to happen




“Importance Score” (Likelihood x Severity) – use this to guide your preference for a risk management strategy

Prevent

Reduce


Transfer




Accept
            Severity scale




            1 - The impact on the project is very minor. We will still meet deliverables on
            time and within budget, but it will cause extra work


            2 - The impact on the project is noticeable. We will deliver reduced functionality,
            go over budget, or fail to meet some of our Engineering Specifications.

            3 - The impact on the project is severe. We will not be able to deliver, or what we
            deliver will not meet the customer's needs.


Severity) – use this to guide your preference for a risk management strategy

            Action will be taken to prevent the cause(s) from occurring in the first
            place.
            Action will be taken to reduce the likelihood of the cause and/or the
            severity of the effect on the project, should the cause occur

            Action will be taken to transfer the risk to something else. Insurance is an
            example of this. You purchase an insurance policy that contractually binds
            an insurance company to pay for your loss in the event of accident. This
            transfers the financial consequences of the accident to someone else.
            Your car is still a wreck, of course.

            Low importance risks may not justify any action at all. If they happen, you
            simply accept the consequences.

				
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posted:9/4/2011
language:Galician
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