development of a manufacturability assessment methodology … · 2017. 1. 10. · design, and...
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Mission ContextResilienceLifecycle CostTradespace
Big DataManufacturabilityReliabilityAffordability
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Tonya G. McCall, Emily Salmon and Larry Dalton
MAKE
Development of a Manufacturability Assessment Methodology and Metric
Manufacturability Assessment
Knowledge-Based Evaluation
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Outline
Intro and Background
Methodology
Case Study Overview
Benefits to Customer
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Project Team “Working Group”
• Research team with 180 combined years of industry
experience.
• Areas of Experience:
Aerospace
Automotive• all-terrain vehicles
• consumer road vehicles
• military vehicles
Consumer & Personal
Care Products
Healthcare
Electronics
Electronic Test Equipment
Elevators
Industrial Parts
Logistics
Medical Devices
Musical Instruments
Networks
Office Furniture
Plant Equipment
Quality Assurance
Residential Appliances
Shipbuilding
Transportation
Utility
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Connecting to the ERS Tradespace
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What is MAKE?
Manufacturability – ease in which a component or product can be
manufactured.
Assessment – detailed review of how the design impacts
manufacturing.
Knowledge-Based – judgment based assessment by subject
matter experts (SMEs).
Evaluation – identification of cost drivers and prescriptive measures to
improve manufacturability.
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What is the need for MAKE?
Product Cost vs. Phase of Product
Life, D.M. Anderson 2014
Improvements in cost,
design, and
manufacturability of the
product
Risk mitigation
Reduction in time-to-market
Provide mechanism for
trade off analysis
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* MRL 7-8
PDR, CDR, PRR
“Potential” Metrics During the Product Life Cycle (ref: Defense Acquisition Life Cycle Chart (DoD Directive 5000.02, 2015)
* MRL 4
Pre-Milestone A
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Ease of Assembly
Requires Special Tooling?
Key issues
Scale driven
Identify cost
drivers
Feeds into MFG readiness
DEFINE
Volume
Product Plan
Product Specs
Bill of Materials
E-D-P Cycle
Key Elements
Framework for Manufacturability Assessment
Recommendations
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Judgment Based Assessment
Proper execution of the MAKE assessment requires
input by subject matter experts (SME) pertaining to the
aspects of manufacturing specified in the matrix in
relation to a particular engineering designed product.
A SME is a person who is generally recognized as an
authority in a particular field by peers/ colleagues who
are also knowledgeable in that field.
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A SME’s Role
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INPUTS
Evaluate:
• Bill of Materials
• Experience/Body of
Knowledge
• Design Data and
Characteristics
Diagnosis:
• Best Practices
• Body of Knowledge
Prescription:
• Best Practices
• Body of Knowledge
OUTPUTS
Evaluate:
• What are the critical
aspects of the design?
Diagnosis:
• How do the critical
aspects of design interact
with the aspects of
manufacturing?
Prescription:
• What are the
recommendations to
improve
manufacturability?
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SME Challenges
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Full access to engineering design data,
design concepts, mfg information.
Balance mfg process expertise, best practices with tribal knowledge of company and product.
Awareness of tribal
knowledge and impact to
assessment
Thorough knowledge of supply chain and quality
issues
Team of 2-3 SME’s per assessment…objectivity…checks and balances
Knowledge of company’s product and
manufacturing plan
Insight into possible
manufacturing site…available equipment, etc.
Knowledge of organization
structure culture
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Affinity Diagram Exercise Grouped ideas were translated into the following:
91 elements
Observed interactions/overlap
between the elements and the grouped categories
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Development of Key Elements
The assessor’s intent would be to understand the impact
of characteristics of the “design” on particular areas
of “manufacturing”?
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Evaluation Phase
Manufacturability Interaction Matrix
► Understand “impact of the design” on
“particular aspects of manufacturing”
► Original matrix was 15 x 9 but was
reduced after 1st case study due to
overlap of the aspects of design and
manufacturing
► Shows the interactions (X) between the
“aspects of design” and the “aspects of
manufacturing”.
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Evaluation – Rating Scales
SME Rating system* (1 – 100) based on the following criteria:
* Based on prior work with a large defense contractor – needs to be further
validated with subsequent research
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Evaluation PhaseMAKE Tool
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Diagnosis PhaseUnderstand cost drivers and areas of risk.
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74.775
75.9
These scores
are derived
from the
weighting
algorithm in the
tool.
Proposed manufacturability score would
be lowest scoring part = 74.7
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Diagnosis PhaseInvestigate into specific part #s with lower scores ultimately pursuing root
causes.
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Diagnosis PhaseDive deeper into PMI to understand the impact of the design on
particular aspects of manufacturing.
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Prescriptive Phase
Example of a typical recommendation
Concern Recommendation
Standardization of fasteners - Various different fasteners used within the
assembly requiring the operator to use multiple
types of tools. Evaluate the fasteners and
standardize across the assembly
Use of a socket that touches the resistor. 1) Adhere to design for manufacturability guidelines –
design must account for tooling needed for
manufacturing and assembly process.
2) If design cannot be changed to accommodate
tooling, specify tools in mfg that accommodate the
design concern. In this case, use thin walled
sockets or specify the use sockets with protective
coating.
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Prescriptive Phase
Recommendations to improve the manufacturability scores
Qualify these based on effort and risk to the company
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Case Study
R&D company (contractor to DoD) preparing to enter low-
rate production stage of product manufacturing
Focus of the team was to review CAD drawings and
physical prototype to provide client with a
manufacturability assessment of the product
Long term strategy for increased production rate and/or
transition to commercial manufacturing
Study conducted by SME’s from the MAKE team.
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Evaluation
Two products were evaluated: Product A (main product),
and Product B (accessory to Product A)
A total of 32 parts included in the assessment
Consisted of injection molded parts, fabricated metal parts,
MIL-SPEC hardware and connectors, wiring harnesses,
circuit boards with modules
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Diagnosis – Product A*
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123
4
567
8
9
10
11
12
1314
151617
19
2120
22
18
*only Product A will be discussed in this presentation
Part 1: 82.9
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Diagnosis – Product APart 1 deep dive
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Prescription Phase – Product A
Priority 1: 18
Priority 2: 26
Priority 3: 15
Priority 4: 99
Recommendation matrix
(included in final client
package) addresses 158
concerns
SME team evaluated the
effort associated with each
recommendation.
Prioritization of the
recommendations was
provided.
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Recommendation Summary
Product Score # of concerns # of recommendations Agreement*
A 74.7 158 80 67%
B 82.9 69 49 66%
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* Based on feedback from case study client as results were presented. This
information will be verified/updated after additional review of the assessment
details by the client.
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Benefits of Structured Manufacturing Assessments Throughout the Product
Lifecycle Better determination and mitigation of risks
More consideration of manufacturing issues earlier in the design
phase and throughout the design review process
Reduction of costs throughout the product lifecycle
Better decision making (mfg processes, suppliers, etc.)
More considered Make/Buy Supply Chain Decisions
More concise determination of TRL & MRL Status
Provides approach for producibility analysis in support of
AS6500
Enhanced resilience of product
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Acknowledgements
This material is based upon work supported by the U.S. Army
TACOM Life Cycle Command under Contract No. W56HZV-08-C-
0236, through a subcontract with Mississippi State University,
and was performed for the Simulation Based Reliability and
Safety (SimBRS) research program. Any opinions, findings and
conclusions or recommendations expressed in this material are
those of the author(s) and do not necessarily reflect the views of
the U.S. Army TACOM Life Cycle Command.
• This research is also partially supported by Mississippi State
University, the Center for Advanced Vehicular Systems
Extension, and the Institute for Systems Engineering Research.
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Thank you!!
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