161130 Progress Update WP2 (Bram Westerweel)

1. Period SINTAS meeting:
Update work package 2
B. Westerweel

2. Agenda
• Looking back on year 2
• First paper completion
• Key findings
• Looking ahead to year 3
• Identification of next research topics
• Discussion
7/14/2016SINTAS 30-11-2016 2

3. Traditional or additive manufacturing?
• First paper is on trade-offs between traditional and additive
manufacturing
• We take a lifecycle cost perspective:
7/14/2016SINTAS 30-11-2016 3
Design Production Exploitation Disposal
Unit production
costs
Component
reliability
Replenishment
leadtime
Component
design costs
Performance
benefits

4. Analysis: Evaluating break-even MTBF
7/14/2016SINTAS 30-11-2016 4

5. Case study: Valve block
• This case study centers around a hydraulic valve block that is used to
control bucket movement of a boom lift.
SINTAS 30-11-2016 57/14/2016

6. Case study: Bracket
• This bracket is used to control the wing flaps of a business jet. Each jet
has one of these at the end of each wing tip.
SINTAS 30-11-2016 67/14/2016

7. Main findings
• We find that for an AM component to be preferred:
• AM development and production costs may exceed those of the regular part
• The AM component may be less reliable than the regular one
• Currently, performance benefits are very important to offset high production costs
• We further find that:
• Reducing AM’s leadtime even further does not bring much benefits,
• which suggests that industry should focus on production quality and costs, instead
of production speed
• The paper has been submitted to Reliability Engineering and System Safety
7/14/2016SINTAS 30-11-2016 7

8. Second research topic
• This research focuses on the application of on-site additive
manufacturing.
• Inspired by on-site AM in Mali (RNA) and on board US Navy aircraft carriers
SINTAS 30-11-2016 87/14/2016
• Some interesting research questions:
• Should organizations invest in on-site AM capacity?
• How does on-site AM capacity affect inventory
decisions?
• Should AM parts be used temporarily or as more
permanent solutions?

9. Decomposing the problem
• Several general problem aspects:
SINTAS 30-11-2016 97/14/2016
time
Regular component
arrival
Regular component
arrivalPenalty reduction
Regular component
failure
Print and install
AM part
Depot POD
Mission
Area
Periodic
deterministic
service
Stochastic
service
• Strategic dual sourcing problem, with AM
capacity to protect against uncertain
demand + lead times
• Assessing the savings potential we can
achieve with on-site AM capacity
• Finite time horizon with first
stage decisions and operational
decision rules

10. Discussion on “Temporary AM”
• Will AM parts that are printed on-site match the performance and
reliability of regular parts?
SINTAS 30-11-2016 107/14/2016
Regular
part
Zero
reliability
Never use AM,
incur downtime
Use AM
temporarily
Use AM until
failure