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Contract Supervision
Roles & Responsibilities Monitoring Tools & records Quality Assurance/Quality
Control
Construction Management Training Module-1
2
Why we need Contracts?Binding
Forcommitment
Towards Agreed terms
Satisfy Requirement
sFulfill
Obligations
Share Responsibi
lities
Construction Management Training Module-1
3
Consideration ACCEPTANCEOFFER
(Value/ Causa)
CONTRACT
One party
To other party RISK
DETREMENT
LOSS
FOREBEARRANCE
RIGHT
INTEREST
PROFIT
BENEFIT
Key Elements of a Contract
TERMS
EXPRESSED(
Verbal/Writing)
CONDITIONS WARRANTIES
IMPLIED( automatical
ly)
STATUTORY/TRADE
CUSTOMS
Construction Management Training Module-1
5
Conditions of Contract
Conditions
GENERAL( Universal)
PoliciesDefinitionsDispute resolutions
ExecutionTime FramePayment Terms
PARTICULAR( Suit to Environment)
Deviations from General ConditionsSpecific applicationsParticular terms to suit
Construction Management Training Module-1
6
ICTAD CONDITIONS OF CONTRACTS-AVAILABLE PUBLICATIONS
ICTAD/SBD/01 - Standard Bidding Document for Procurement of Works ( Vol 1&2, Yr 2007)
ICTAD/SBD/02 - Standard Bidding Document for Major Contracts ( Vol 1&2, Yr 2007)
ICTAD/SBD/03 - Standard Bidding Document for Minor Contracts ( Vol 1&2, Yr 2007)
ICTAD/SBD/04 - Standard Bidding Document for Design & Build Contracts ( Vol 1&2, Yr 2007)
SCA/3/2 - Specifications for Water Supply, Sewerage & Storm water drainage ( 2nd Edition April 2002)
Parties Involved in Contract SupervisionEmployer
* Site Representatives/Consultants
Contractor*Site Agents
*Sub Contractors
Engineer*Representati
ves
What are the Engineer’s duties and powers?
Supervision Instructions Extensions & Suspension of
Contracts Valuation & Claims Mediation at Contractual Disputes
Engineer’s powers - Supervision
Supervision•Organization & Correspondence•Agreed Contactor’s work programs.•Examining contractor’s proposal’s & Method Statement and approving•Acceptance of tests at completion and ordering commissioning of elements.•Comment satisfaction
Responsibilities of Engineer’s Representatives/ site agents • Act according to delegated functions• Watch, supervise & examine site works with
tests• Adherent to the orders/ decision of the
engineer.• Records on extra or additional works,
pertaining to the extension of time• Joint admeasurements• Order stoppage of work at unsafe situations
/ non-compliance with specification• Assist Engineer on valuation/ claims
11
Monitoring Tools/methods Audit measures the cost or value of inputs, such as materials and manpower, in relation to producing the
outputs. Audit could be in both Technical & Financial Aspects. Audit mainly measures efficiency using quantitative methods.
Management Information System (MIS) is a process by which raw data is collected, summarized and given to the management of a project or program. It includes computer-aided information systems and is meant to alert the managers who then take decisions. MIS is useful for efficiency questions; however, ensuring the validity/accuracy of information can be difficult.
Performance monitoring (also called performance evaluation) checks what is achieved and the expenditure for the different achievements for the project. The validity of performance monitoring can be problematic when performance monitoring is connected to the release of payments.
Auto-monitoring (also called auto-evaluation) originally meant assessment by an individual or a small group of their own activities judged against a set of indicator, which they set for themselves. The concept has since broadened to mean increasing the capacity of the project personnel and stakeholders for monitoring their own programs and activities taking control of their own programs. Both qualitative and quantitative methods are used.
Construction Records for Contract Monitoring
Contractor’s Submittals
Submittal register ( Program for submittals)
Master Work Program & Individual programs for sub-components
Method Statements for works including temporary works
Material Test reports and applicable standards
Manufacturer’s performance or test certificates
Safety & Environment Management Plan during Construction
Construction Records
Official site Log book
Resource utilization daily records o Supervisory & Laboro Plant & Machinery
Daily Weather Records or weather charts
Daily work records ( DPR)
Approvals • Pre-inspection records• Prior approval forms ( setting
out, Concrete, etc)• Test witness records ( site &
laboratory)• Testing & commissioning
approval forms
Quality Assurance & Quality Control at Construction
What is Desired Quality?
• Quality of construction attributes appearance, aesthetic, stability, strength and durability
• Construction quality is a relative term and thereby before controlling quality one must have a “reference quality level”
• Quality at construction work shall involve cost & time and thereby tread-offs or balance to be considered with “ complementary cost” and related “time factors”
• Technical quality shall be governed by “ Standards” but Functional or Operational quality is the desired level for intended purpose
Achieved by how & whom?• Shall be an inbuilt element of the design
documentation ( design brief) and as well as at the Contract documentation ( specific terms)
• “Quality Culture” is a important feature at the construction and shall be a achieved through “team spirit “ of both the Engineer /Engineer’s representatives and the Contractor
• Should not strict on “ perfection” or “Zero defects” thereby tolerances and flexibility shall be clearly spelled out at the inception of work and at agreed method statements & shop drawings
• Quality assurance should be ensured through standard quality tests and with trade practices and should disclose the satisfaction of quality of end product after test proceedings
• “ Quality is never an accidently achievement and it always the result of intelligent effort”
Standard Quality TestsField Tests
Long & Short Duration Pumping Tests
Standard Compaction Tests for dry density ( ASTM D 1557, BS 1337)
Hydrostatic Pressure Testing for Pipe Lines ( BS 8010, AWWA C 600, AWWA C 907) )
Hydrostatic Pressure Testing for Water Retaining Structures ( BS 8007)
Sterilization or Disinfection of completed pipe lines ( ANSI/AWWA C 651)
Trial Mix for Concreting (ASTM C 143)
Slump Test for Concreting ( ASTM C 143)
Laboratory Tests• Quality of Water for concreting ( BS 3148)
• Fine & Coarse Aggregates for Concreting (BS 882 or ASTM C33)
• Sampling & Testing of Reinforcement ( BS 4449, Appendix C)
• Concrete Mix Design ( BS 8007, BS8110, BS 5328)
• Admixtures ( ASTM C 494 or BS 5075)
• Curing Compounds ( ASTM C 309)
• Sampling & Testing of Fresh & Harden Concrete ( BS 1881 or ASTM C31 & 39)
• Sampling & Testing of Cement Blocks ( BS 6073 or ASTM C 90)
Practical Aspects/Areas to Give Thought to ensure end Quality at WSS
• Site layouts• Construction sequence at congested work• Depth of pipes & bedding materials• Locating washouts & air valves• Laying pipes in hilly terrains• Mix designs and admixtures for Gr 35 concrete• Temperature control at concreting and placing of
construction joints at water tanks• Color selection for structural elements and buildings
and final finishing techniques• Approving methods for defect repairs