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Design Build. Customer employs design build company Defined new facility Specified completion date Agreed price.

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Presentation on theme: "Design Build. Customer employs design build company Defined new facility Specified completion date Agreed price."— Presentation transcript:

1 Design Build

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

3 Straightforward Design Build Straightforward approach CUSTOMER DESIGN BUILD COMPANY QUANTITY SURVEYOR ARCHITECT OR

4 Straightforward Design Build Scheme design approach CUSTOMER GENERAL CONTRACTOR SPECIALIST DESIGN CONSULTANT

5 Consultant Novation CUSTOMER GENERAL CONTRACTOR SPECIALIST DESIGN CONSULTANT TRADE CONTRACTOR BRIEF & DESIGN CONSULTANTS NOVATED

6 Develop and Construct CUSTOMER GENERAL CONTRACTOR SPECIALIST DESIGN CONSULTANTS SPECIALIST CONSULTANTS DESIGN CONSULTANT TRADE CONTRACTOR

7 Design Build - Key Relationships CUSTOMER GENERAL CONTRACTOR SPECIALIST DESIGN CONSULTANTS SPECIALIST CONSULTANTS DESIGN CONSULTANT TRADE CONTRACTOR ESTABLISHED RELATIONSHIPS BOUNDARYRELATIONSHIPS

8 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

9 Design Build Performance Completion 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

10 Design Build Performance Completion 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

11 Design Build Performance Quality Expectations Design build company involved at start of project: 68 % of projects met customer’s quality expectations Design build company involved after scheme design produced: 48 % of projects met customer’s quality expectations Design build company involved after design is substantially complete: 38 % of projects met customer’s quality expectations Traditional construction: 60 % of projects met customer’s quality expectations

12 Design Build Performance

13 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.

14 TeamsTeam-days Brief180 Design14560 Plan 2150 Procurement9600 Manufacturing5150 Production Commissioning7140 TOTALS

15 For a project with 105 teams (N=105) Possible relationships = 105 x 104/2 = of these do not occur Actual relationships = 1773

16 Largest number of teams in one time interval is 29 in 22 nd and 32 nd 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 contractor’s plan and control teams 29 x 28/2 = 406 possible relationships

17 During the 32 nd 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 contractor’s plan and control teams This gives a total of 22 teams with 231 relationships

18 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 E R =1128/1773=0.64

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

20 Relationship Quality Indicator for established relationships ranges from 0.35 to 0.98 Total Relationship Quality Indicator 834/1773=0.47 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

21 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

22 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 Rp=0.78

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

24 Established Relationships E R =0.64 Relationship Fluctuation F E =0.75 Relationship Quality Q R =0.47 Relationship Configuration C R =0.87 Performance Variability R p =0.78 External Interference I=0.45 Project using Design Build

25 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


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