Single stage design and build method & construction project management
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This document discusses the single stage design and build methodology in construction project management, highlighting its strengths, limitations, and the challenges faced by project managers. It emphasizes the importance of a well-defined design concept and thorough management of the design process to mitigate risks and ensure effective project delivery. Additionally, it outlines risk mitigation strategies, including comprehensive tender documents and careful contractor selection, to foster successful project outcomes.
![GC/Works/1 Single Stage Design and Build Methodology
In the single stage design and build methodology the contractor is not involved in the
project planning at the initial stage. Therefore offers are submitted with less information,
making the firm price only as wholesome as the design information. Also, any change
undermines certainty achieved with a lump-sum tender, and if cost assessment or the
contractor’s working method is incorrect, the risk transfer may have little value, and the
tenderers will take pricing risk due to the competitive pressure, and the approach offers
reduced scope for a shared objective or for a contractor’s contribution to the design
development.
Notwithstanding, with this approach there is cost certainty, risk allocation in the contract
is well defined, pricing is competitive, the cost of tendering simplifies tendering process,
with a complete, well-documented design there is a clear delineation of design and
construction obligations, and timescales are identified creating less opportunity for
extended negotiation (Simon Rawlinson, 2008)
Challenges and associated risk mitigation measures
• Ensuring all problems are identified - this can effect in delay, design changes, co-
ordination hitches – ensure the design concept is detailed and well defined and
involves all professional disciplines early on.
• Managing the design process including co-ordination and responsibility to
produce certainty – this can lead to poor design programming and tracking and
product – thoroughly apply design-stage reviews and freezes considering cost
management procedures (Sundaram, 2008), all the elements of green design
(Kubba, 2010, p.305), value management (CIOB, 2008, p.28), and the most
technically advanced and applicable suite of construction design codes (British
Standards Institute, 2009)
• Ensuring tender documents are complete or unambiguous – this can lead to
errors or blunders in the contractor’s offer – make sure the tender documents are
in accordance to the code of procedure for single stage selective tendering
(1996, NJCC)
• Selecting the spot-on contractor – poor selection can lead to poor delivery and
unsatisfied client – invest in pre-bid conferences and mid-tender consultation
using quality criteria and maybe e-tendering software (Simon Rawlinson, 2008)
• Mitigating contractor’s risk – while this creates competitive pricing it tends to
leave the contractor’s exposure open-ended - limit the contractor’s risk and
minimise work design during construction, and permit the contractor as much
discretion over specialists selection
_____________________________________________________________________________________
References
British Standards Institute (2009) BSI structural Eurocode companion [Online] Available from:
http://www.bsigroup.com/upload/Standards%20&%20Publications/BrochureDownload/pdfs/BSI
%20EurocodesBro2010.pdf (Accessed: 4 March 2011).
Chartered Institute of Building (2010) Code of practice for project management for construction and
development 4th ed. Oxford: Wiley-Blackwell](https://image.slidesharecdn.com/singlestagedesignandbuildmethodconstructionprojectmanagement-120810062113-phpapp01/85/Single-stage-design-and-build-method-construction-project-management-2-320.jpg)
Single stage design and build method & construction project management
- 1. Single Stage Design and Build Method & Construction Project Management John Constance MSc in Project Management, University of Liverpool Introduction When design concept drawings are produced this indicates that a design brief has been implemented and additional data has been prepared (RIBA 2007). The design concept drawings include completed structural and building services systems, specifications and the design initial cost plan. The use of the GC/Works/1 Single Stage Design and Build methodology indicates that the number of tenderers are restricted and narrowed down to an approved list based derived from applicants experience, general skills, financial capacity, integrity, and their demonstrated competence and quality assurance approach. Considering the two factors, this paper reviews the strengths and limitations of single stage design and build methodology and the major challenges it imposes on project managers for construction during design work; and how these challenges and their associated risks can be mitigated. Design Concept Drawings According to the USACE (2008) Engineering Guide Design manual, the design concept comes immediately after the special consideration of function, sustainability, technical codes and standards, construction classification, accessibility standards, site adaptation and alternative design and recommendations are completed and approved by the client. With this information the designer can then produce construction drawings that will include a cover information, perspective and architectural plans including floors, fire protection code compliance, demolition, etc. and elevations and sections. With this information the designer can now proceed to produce intermediate plans and a final design. However, during this stage it is important the construction project manager ensure that a monitoring and controlling system is in place to produce the design information (CIOB, 2010, p.44). Selecting a design team leader can do this and there should be meeting of the design team and other consultants to review all characteristics of the project. There should also be a design management plan to show roles and responsibilities, drawing type size and format, and schedules, computer aided design interdependencies, an IT data transfer system, the impact of design resources to the productivity achieved, design changes procedure and their predictive effects, and design performance review. Fewings (2005, p.234) advised that design management be done to ensure that building design information be the best quality and be constructed at the right time and delivered to the right people. This is important for the construction project manage so as to have the design team fully prepared for the issuance of the tender.
- 2. GC/Works/1 Single Stage Design and Build Methodology In the single stage design and build methodology the contractor is not involved in the project planning at the initial stage. Therefore offers are submitted with less information, making the firm price only as wholesome as the design information. Also, any change undermines certainty achieved with a lump-sum tender, and if cost assessment or the contractor’s working method is incorrect, the risk transfer may have little value, and the tenderers will take pricing risk due to the competitive pressure, and the approach offers reduced scope for a shared objective or for a contractor’s contribution to the design development. Notwithstanding, with this approach there is cost certainty, risk allocation in the contract is well defined, pricing is competitive, the cost of tendering simplifies tendering process, with a complete, well-documented design there is a clear delineation of design and construction obligations, and timescales are identified creating less opportunity for extended negotiation (Simon Rawlinson, 2008) Challenges and associated risk mitigation measures • Ensuring all problems are identified - this can effect in delay, design changes, co- ordination hitches – ensure the design concept is detailed and well defined and involves all professional disciplines early on. • Managing the design process including co-ordination and responsibility to produce certainty – this can lead to poor design programming and tracking and product – thoroughly apply design-stage reviews and freezes considering cost management procedures (Sundaram, 2008), all the elements of green design (Kubba, 2010, p.305), value management (CIOB, 2008, p.28), and the most technically advanced and applicable suite of construction design codes (British Standards Institute, 2009) • Ensuring tender documents are complete or unambiguous – this can lead to errors or blunders in the contractor’s offer – make sure the tender documents are in accordance to the code of procedure for single stage selective tendering (1996, NJCC) • Selecting the spot-on contractor – poor selection can lead to poor delivery and unsatisfied client – invest in pre-bid conferences and mid-tender consultation using quality criteria and maybe e-tendering software (Simon Rawlinson, 2008) • Mitigating contractor’s risk – while this creates competitive pricing it tends to leave the contractor’s exposure open-ended - limit the contractor’s risk and minimise work design during construction, and permit the contractor as much discretion over specialists selection _____________________________________________________________________________________ References British Standards Institute (2009) BSI structural Eurocode companion [Online] Available from: http://www.bsigroup.com/upload/Standards%20&%20Publications/BrochureDownload/pdfs/BSI %20EurocodesBro2010.pdf (Accessed: 4 March 2011). Chartered Institute of Building (2010) Code of practice for project management for construction and development 4th ed. Oxford: Wiley-Blackwell
- 3. Fewings, P. (2005) Construction project management: an integrated approach. London: Taylor & Francis Kubba, S. (2010) ‘Elements of green design and construction’. In: Green construction project management and cost oversight. Oxford: Architectural Press, pp.28-70 NJCC (1996) Code of Procedure for Single Stage Selective Tendering Published for the NJCC by RIBA Publications, Finsbury Mission, 39 Moreland Street, London EC1V 8BB RlBA Publications is a division of RlBA Companies Ltd © 1996 NJCC Printed by The Broadwater Press Ltd, Welwyn Garden City, Herts Outline Plan of Work 2007 Work Stage Sequences by Procurement Method, Royal Institute of British Architects © RIBA 2007 Simon Rawlinson (2008) Procurement single-stage tendering 21.11.2008 building magazine (Online) Available from: http://www.building.co.uk/data/procurement-single-stage-tendering/3127871.article Sundaram, V. (2008) ‘Essentials of design phase cost management and budget control’, Cost Engineering, 50 (2), pp.24-28. USACE (2008) Engineering Guidance Design Manual, Seventh Edition, US Army Corps of Engineer and Support Center, Huntsville, Huntsville, Alabama