QS/QC questions

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&CONSTRUCTION

QUALITY ASSURANCE (QA)

and QUALITY CONTROL (QC):Instituting strict compliance to undertake

Trial Section in all road constructionand rehabilitation schemes

under MRDP2

Q

A

Questionsand

Answerson

Department of Agriculture

MINDANAO RURAL DEVELOPMENT PROGRAM 2


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Information Bulletin No. 12/October 2012

About MRDP

The Mindanao Rural Development Program -

Adaptable Program Loan Phase 2 (MRDP2) continues to implement poverty-

reducing interventions in more poor communities across Mindanao as it

expands in scope of coverage (225 towns in 26 provinces).

Implemented under the Department of Agriculture, MRDP1 accomplished

various projects and provided signicant learning experiences on which

MRDP2 takes off.

MRDP2 seeks to further improve rural incomes and achieve security

through agri-sheries infrstructure, livelihood enterprise, and biodiversity

conservation projects.

Partnership with LGUs and other national agencies are also forged for

laudible impact in Mindanao rural communities.

Alongside poverty-reducing initiatives, the Program likewise reinforces the

implementation of the Local Government Code and the Agricultural andFisheries Mondernization Act.

Working interdependently to bring development in the country-side are four

MRDP components: Rural Infrastructure, Community Fund Agricultural

Development, Natural Resources Management and Investment for

Governance Reforms and Program Administration.


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?1. What is Quality AssuranceQuality Assurance (QA) is a funcon of the owner and/or implemenng

unit to verify that the work is done in accordance with the specicaons.

It includes all those planned and systemac acons necessary to providecondence that the product or service will sasfy given requirements for

quality.

QA usually requires connuing evaluaon of factors that aect the

design or specicaon for intended applicaon as well as vericaon of

installaon and inspecon operaons.

2. What is Quality Control

Quality Control (QC) is checking for conformance materials

specicaons and methods of construcon or workmanship.

Control on the correct plan interpretaon, proper engineering

construcon methodology, and strict compliance of the standard

specicaons.

Includes all procedures, which are necessary to insure that thematerials used, and workmanship employed conform to the standard

of quality specied.

Instuted during the course of construcon as a prevenve tool,

not as a correcve measure. Prevenve measures are always more

economical.

A technique that ensures to fulll the requirements for quality in any

operaonal procedures.

A process that is done to eliminate causes of unsasfactory

performance of the works.

To summarize:

Quality - Degree of excellence

Control - To check and regulate

Assurance - Degree of certainty

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3. How can QAand QCbe carried out

To ensure QA and QC in the project, provisions spulated in the Contract

must be carried out. The project must conform to the requirements

specied in the following documents, which form part of the Contract:

1. Condions of Contract;

2. Special Condions of Contract;

3. Specicaons;

4. Performance Security;

5. Plans and Drawings;

6. Construcon Monitoring and Reporng Templates;

7. Comprehensive All-Risk Insurance;

8. Construcon Safety, Health and Environmental Management

Program;

9. Materials Quality Control Program; and

10. Constructors Performance Evaluaon System (CPES).

4. What are the common issuesencountered byLGU contractors

Aer contract award and upon resource mobilizaon, the pledged

key technical personnel (SCC Clause 6.5) are nowhere to be found.

In most cases these are replaced with unauthorized, somemes

unqualied personnel. Equipment mobilized are not the equipment pledged and most of the

mes Contractor fails to meet minimum requirement.

Does not undertake as-stake survey resulng in quanty and

eventually funding issues due to unforeseen variaons.

Materials tested for quality are not representave samples extracted

from actual quarry sites.

?

?


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5. What are some commonissues encountered byLGU

Construction Supervision team

Lacks necessary qualicaon and experience in construcon

supervision

Poor supervisory and documentaon skills therefore cannot enforce

authority to undertake QA\QC procedures

Mul-tasked with o-project responsibilies due to LGUs lack of

technical personnel therefore daily presence at the site is not assured

Lack of surveying skills

Poor communicaon skills

Lack of materials tesng and inspecon skills

6. What are the consequencesifQAand QC is overlooked

QA/QC issues are likely to happen if there is no concisedocumentaon of project acvies

Compromise human and environmental safety

Causes unnecessary reworks

Creates conict on contract me management- owner and contractor

having dierent accounts on delays

Project design life is likely to shorten due to poor quality

Breeding ground for fraud

Creates reputaonal risks

And a host of other issues

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7. What are the auxillary (tool) kits forStandard Construction Supervision

and Contract Management

Contract Domain Toolkit Control measures

1. Quality Materials QCP, Technical

Specicaons, Plans (lines

and grades), Shop Drawings,

Site Instrucons, Request for

Informaon, Work Requests,

Materials Test Report, CPES,

DLP, Performance Security

1. Concise and

up-to-date

documentaon of

daily acvies.

2. Contract

Management and

QA/QC skills

3. Variaons - Workfor aected work

items can only

commence aer

approval of VO

2. Quanty Approved as-stake survey,

Approved as-staked quanty,

Inspecon Report, Back-up

Calculaons, SWA, Weekly

Accomplishment Report,

Straight Line Diagram, PERT-

CPM

3. Cost Approved Unit Cost Analysis,

SWA, Cash Flow Schedule,

Payment Cercates, CARI

4. Time Weather Chart, Suspension

and Extension of Time,

Producvity Losses, Statement

of Time Elapsed, S-curve and

Bar Chart, Request for Time

Extension

8.What are the constructionpreparatory procedures

For materials quality tests:

Joint Owner-Contractor reconnaissance survey on materials source

sites

Extracon, marking of samples, preparaon of sample cards and

delivery to accredited tesng center under an approved Work Request

Preparaon and submission by Contractor its Quality Control Plan

(QCP) for approval by Owners representave.

?

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Sampling, marking and tesng of

roadway materials

Blending aer obtaining sasfactory

test results from laboratory

For as-stake survey:

Joint Owner-Contractor As-staked (pre-construcon) survey (Specs,

Item 104.3.20). Idenfy and adjust/incorporate into the As-Staked

Survey the secons, sites and other details from original approved

plans not consistent with actual site condions as jointly surveyed.

Submission of As-staked plans and quanes for approval by Owner. Introduce Variaon Order No. 1 if possible changes in me, quanty

and cost are found necessary based on the results of the as-staked

survey.

As-stake survey is one of the rst stages ofaaining QA and QC.


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9.What are the requirements that needs to besubmitted by the contractor to the LGU once the

Notice to Commence Work (NTC) takes effect

Materials QCP

As-Staked Plans

Revised Construcon Schedule (in PERT-CPM, S-Curve with Bar Chart,

Manpower, Equipment)

Contractors Health, Safety and Environment (HSE) Program

Credenals of Key Personnel (CVs)

Project Signboard MRDP Standard Reporng Templates

Photo Documentaon Procedures

Relevant Implementaon Guidelines (on Variaons, Time Suspension/

Extension, etc.)

Contractors Organizaonal Structure

Discussing these concerns in pre-construcon conferences does notassure Contractors compliance.

TRIAL SECTIONS

10.What are the DPWH Standard Specifcations

for Roads and Highways (2004, Blue Book)

>>Clause200.3.4and201.3.4TrialSecons

Purpose - to check the suitability of the materials and the

eciency of the equipment and construcon method which is

proposed to be used by the Contractor.

Contractor must use the same material, equipment and

procedures that he proposes to use for the main work.

One trial secon of about 500 square meters shall be made

for every type of material and/or construcon equipment/

procedure proposed for use.

Aer nal compacon of each trial secon, the Contractor shall

carry out such eld density tests and other tests required as

directed by the Engineer.

?

?


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A new trial secon shall be constructed if:

a. the proposed materials, equipment or procedures in the

Engineers opinion are not suitable for sub-base,

b. the basic condions regarding the type of material or

procedure change during the execuon of the work

>> Tolerances

Quality indicator Item 200 Item 201

Permied variaon from design

Thickness of Layer

20 mm 10 mm

Permied variaon from design Level

of Surface

+10 mm

-20 mm

+ 5 mm

-10 mmPermied Surface Irregularity

Measured by 3-m straight-edge

20 mm 5 mm


Crossfall or Camber

0.3% 0.2%


Longitudinal Grade over 25 m in length

0.1% 0.1%

11.What are the procedures in preparing trial sections

Step 1. In coordinaon with the Contractors Project Engineer (PE),

LGU Resident Engineer (RE) idenes road secon where Trial Secon

will be undertaken in accordance with minimum requirements of the

Specicaons (Block 8).

RE issues Site Instrucon to Contractor to undertake Trial Secon

starng with subrade preparaon.

PE submits Work Request indicang type of acvity, staon limits and

esmated item quanes for approval by RE. Materials Quality Tests

and As-staked Plans should be approved prior to approval of Work

Request.

Note: Preparaon of the trial secon should not be a prior

requirement for inial/preparatory acvies such as Clearing and

Grubbing and Earthworks. These acvies can proceed independently

in accordance with approved construcon schedule.

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Step 2. Inspecon and Cercaon

Lines and Grades: Refer to: a) Approved As-staked Plan, and b)

Allowable Tolerances (Block 8)

Quality of Compacon: Field Density Test (FDT) - refer to approved

Quality Control Plan (QCP) requirements

- Determine number of passes for type of roller used

Repeat process if results are unsasfactory via issuance of Site

Instrucon. Proceed to the next layer (Item 200) otherwise.

RE signs o on Inspecon Report to manifest Contractors compliance

to requirements.

Step 3. Item 200

PE submits Work Request for approval by RE

Lines and Grades Must comply with the allowable tolerances for

Item 200 (Block 8)

Quality - Compacon via Field Density Test (FDT) - refer to QCP and

Specs requirements

-Determine number of passes for type of roller used

Repeat process if results are unsasfactory via issuance of SiteInstrucon. Proceed to the next layer (Item 201) otherwise.

RE signs o on Inspecon Report to manifest Contractors compliance

to requirements.

Step 4. Item 201

Repeat the same procedures in Item 3.

Note: Make sure that all materials incorporated into the various

roadway layers are in accordance with approved grading, blending

and moisture content requirements, immediately preceding its

incorporaon. Materials passing individual quality tests done at

laboratory may not necessarily qualify for incorporaon due to

inappropriate processing and handling.

Approved QCP Approved As-Staked

Survey

Site Instrucon

Trial Secon

Work RequestExecuonInspecon and

Cercaon


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Item 105 - Sub-grade preparaon. Check

compliance to lines and grades aer applicaonthen for compliance to compacon requirements

via FDT.

2

Spreading. Compacon. Check for compliance to lines and

grades prior to FDT.

1

3 4

5 6


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Repeat the sameprocedure for Item 201

(and 300 if required)

SamplephotosofTrialSeconacvies

Making available

standard set of eld

Materials Tesng

Apparatus saves the

Contractor substanal

amount of me and

money. This requirementcould form part of the

SCC.

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QUICK NOTES:

1. (Strictly) enforcing Trial Secon is not an assurance of full

compliance to the Projects QA/QC objecves.

2. It is only an inial step in achieving quality assurance related to

workmanship and procedures specially for LGUs who play the major

role as Construcon Supervisors and Contract Managers.

3. This exercise is meant to raise the awareness of sub-project

implementaon stakeholders of the standard procedures of

check and balance right at project start up by achieving: a.Proper

construcon methodology b.Concise and up-to-date documentaon

and monitoring of sub-project acvies using basic tools such as

Work Requests, Site Instrucons, Requests for Informaon and Daily

Acvity Log/Weather Report.

4. QA/QC conicts can only be resolved if the proper ow of

documentaon is observed to a high degree of specicity by both

Contractor and Owner.

5. PSO/RPCO RIEs presence are required in this exercise.


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Produced by:

Informaon, Advocacy, Communicaon and

Educaon (InfoACE) UnitIn coordinaon with the

Rural Infrastructure Component

Mindanao Rural Development Program 2

PROGRAM SUPPORT OFFICE


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MINDANAO RURAL DEVELOPMENT PROGRAM

PROGRAM SUPPORT OFFICE

Alvarez Bldg., A. Angliongto Sr. Ave.,

Lanang, Davao City 8000

Telephone No.: (082) 235-8665

Telefax: (082) 235-8664

Email: [email protected]

Website: www.damrdp.net

REGIONAL PROGRAM COORDINATION OFFICES

Region 9


Western Mindanao Integrated

Agricultural Research Center

(WESMIARC)

Ipil, Zamboanga Sibugay 7001

Tel.: (062) 333-2508Email: [email protected]

Region 10


Regional Field Unit 10

A. Luna St.,

Cagayan de Oro City 9000

Te.: (08822) 728-236

Fax: (08822) 726564 | 725725

Region 11



F. Bangoy St., Davao City 8000

Te.: (082) 221-9697

Fax: (082) 226-3625


Region 12



3rd Flr. CSA Bldg., cor. Zulueta Gensan

Drive., Koronadal City 9506

Te.: (083) 520-0622/0624/0625

Fax: (083) 520-0628

Region 13



Capitol Site, Butual City 8600

Te.: (085) 341-2045

Fax: (085) 341-2114


ARMM

Department of Agriculture and

Fisheries (DAF) ARMM

ORG Compound, Cotabato City 9600

Te.: (064) 421-1396

Fax: (064) 421-1396



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