Design Build

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Design Build
2
Design Build

• Customer employs design build company
• Defined new facility
• Specified completion date
• Agreed price

3
Straightforward Design BuildStraightforward
approach
QUANTITY SURVEYOR
ARCHITECT
OR
CUSTOMER
DESIGN BUILD COMPANY
4
Straightforward Design Build Scheme design
approach
SPECIALIST DESIGN CONSULTANT
DESIGN CONSULTANT
CUSTOMER
GENERAL CONTRACTOR
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Consultant Novation
BRIEF DESIGN
CUSTOMER
CONSULTANTS NOVATED
GENERAL CONTRACTOR
TRADE CONTRACTOR
DESIGN CONSULTANT
SPECIALIST DESIGN CONSULTANT
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Develop and Construct
CUSTOMER
DESIGN CONSULTANT
GENERAL CONTRACTOR
SPECIALIST DESIGN CONSULTANTS
SPECIALIST CONSULTANTS
TRADE CONTRACTOR
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Design Build - Key Relationships
CUSTOMER
DESIGN CONSULTANT
GENERAL CONTRACTOR
SPECIALIST DESIGN CONSULTANTS
SPECIALIST CONSULTANTS
TRADE CONTRACTOR
BOUNDARYRELATIONSHIPS
ESTABLISHED RELATIONSHIPS
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Project Process

• Customer advised by consultants
• Select design build company
• Design team and management team
• Single point of contact with customer
• Brief, design and plan
• Procurement, manufacture, produce and commission
• Supervision by consultants

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Design Build PerformanceCompletion on Time

• Design build company involved at start of
  project 78 of projects completed on time or
  early
• Design build company involved after scheme design
  produced 70 of projects completed on time or
  early
• Design build company involved after design is
  substantially complete 66 of projects
  completed on time or early
• Traditional construction 56 of projects
  completed on time or early

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Design Build PerformanceCompletion within Budget

• Design build company involved at start of
  project 76 of projects completed within 5 of
  the agreed budget
• Design build company involved after scheme design
  produced 69 of projects completed within 5 of
  the agreed budget
• Design build company involved after design is
  substantially complete 90 of projects
  completed within 5 of the agreed budget
• Traditional construction 68 of projects
  completed within 5 of the agreed budget

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Design Build PerformanceQuality Expectations

• Design build company involved at start of
  project 68 of projects met customers quality
  expectations
• Design build company involved after scheme design
  produced 48 of projects met customers quality
  expectations
• Design build company involved after design is
  substantially complete 38 of projects met
  customers quality expectations
• Traditional construction 60 of projects met
  customers quality expectations

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Design Build Performance
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Project using Design Build

• The project is to construct a new hotel on a
  virgin site. The hotel has 300 guest rooms and
  the other spaces expected in a 5 hotel
• The building is 10 stories high with a steel
  structural frame, concrete beam floors and roofs,
  and high quality, pre-fabricated external
  cladding.

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• Teams Team-days
• Brief 1 80
• Design 14 560
• Plan 2 150
• Procurement 9 600
• Manufacturing 5 150
• Production 67 2820
• Commissioning 7 140
• TOTALS 105 4500

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• For a project with 105 teams (N105)
• Possible relationships 105 x 104/2 5460
• 3687 of these do not occur
• Actual relationships 5460 - 3687 1773

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• Largest number of teams in one time interval
• is 29 in 22nd and 32nd time interval
• They are constructing the external envelope,
• service cores, risers and main plant, the main
  entrance and vertical circulation
• Externally there is landscaping and
• external services are being installed
• The work is supervised by design build
  contractors plan and control teams
• 29 x 28/2 406 possible relationships

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• During the 32nd time interval the following teams
  work simultaneously
• 4 out of 6 external envelope teams
• 4 out of 6 service core teams
• 5 out of 5 risers and main plant teams
• 6 out of 12 entrance and vertical circulation
  teams
• 1 out of 1 contracts and payment systems teams
• 2 out of 3 design build contractors plan and
  control teams
• This gives a total of 22 teams with
• 231 relationships

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• Established Relationships
• Every team on a project has established
  relationships with at least one but often several
  other teams giving a total of 1128 established
  relationships
• Established Relationships Indicator
  ER1128/17730.64

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• The relationship fluctuation indicator
• FE 0.75
• This reflects a strong influence of established
  relationships throughout the project because both
  ER and FE are comparatively high
• Design build companies may have established
  relationships with a significant number of other
  construction companies

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• Relationship Quality Indicator for established
  relationships ranges from 0.35 to 0.98
• Total Relationship Quality Indicator
  834/17730.47
• Although there are a number of high values for
  individual Relationship Quality Indicators, the
  total Relationship Quality Indicator is only
  moderately good because the 1128 established
  relationships out of possible 1773 relationships
  are of moderate quality

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• The project organisation is not overly complex
  There are 34 time intervals out of a potential
  maximum of 209
• The intervals are relatively short in comparison
  to total project duration (prevent escalation of
  problems when teams interact for a prolonged
  period)
• Relationships configuration complexity indicator
  0.87

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• The past performance of the 105 teams over their
  previous 10 projects provides team Performance
  Variability Indicators which range from 0.30 to
  1.0
• Performance Variability Indicator
• Rp0.78

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• Historical records for projects using
• Design Build gives
• External Interference Indicator 0.45

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Project using Design Build
Established Relationships ER0.64
Relationship Fluctuation FE0.75
Relationship Quality QR0.47
Relationship Configuration CR0.87
Performance Variability Rp0.78
External Interference I0.45
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Efficient Design Build acts on the following
propositions

• Improve the quality of relationships
• Reduce performance variability
• Select teams competent in the technologies
  required by the project
• Ensure teams accept the agreed objectives
• Ensure teams are motivated to achieve agreed
  objectives
• Foster accurate communications between teams