Revsion:
Date:
Risks & Contingencies
Risk Item1
Acetal gears fail
Set screw on wheel hub slips
Level2
3
3
Owner
Status and/or Contingency Plans
Order extra gears ahead of time if the gears fail or wear down
Use locktite on the set screw or machine a keyway in the shaft and
wheel hub to accommodate a key
Have the RIT machine shop help with making some parts or simplify
the design slightly to make it easier to machine
Lead time for machined parts is too
long
2
Motor fails
2
Order another motor with overnight shipping
1
Motor coupling alignment is off
Motor coupling / gear set screws
loosen
4
Have the coupling plunge EDM or machined to accept the double flats
of the motor shaft
Use locking set screws or locktite
Encode fails
3
Order another encoder
Lower structure deforms or fails
catastrophically
1
Machine another part
Bearings fail
4
Order more bearings
Motor coupling bends
3
Drive shaft bends
3
Servo fails
3
Excessive wobble between upper
and lower housing
Thrust bearing fails
Centering bearing fails
Upper housing bends
2
Machine another coupling out of stronger material and reassess the
design to figure out the cause
Machine another shaft out of stronger material and reassess the design
to figure out the cause
Order another servo or substitute in servo purchased by P09204 until an
appropriate replacement can be found.
Replace the c-clip with a steel ring and run a bolt through said ring
3
3
4
Order another thrust bearing, identify the cause of the failure
Order another ball bearing, identify the cause of the failure
Create a new part that has an added rip to prevent bending
Decision Date
Revsion:
Date:
Risk Item1
Level2
Owner
Status and/or Contingency Plans
Decision Date
Servo coupling fails
3
Order a new coupling
1
Risks are often categorized on the basis of risk type or impact to the project, to help teams organize and insure completeness of the risk assessment. Risks
impact projects in 3 primary ways: performance (features, functionality, quality), schedule, or cost. Types of risk include: technical, quality, or performance
(eg. high-risk technologies or changes in standards, unrealistic features or performance goals); project management risks (eg. time and resource allocation, poor
planning); organizational risks (eg. inconsistent team priorities); external risks (eg. regulatory, customer priority changes, weather). Some risks fall into
multiple categories, so you may want to use a categorization scheme only as an aid to completing the assessment.
2
Choose a meaningful scale (eg. High, Med, Low; or 1=Critical, 2=High, 3=Med, 4=Low).