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LINEARLINEARPROGRAMMIMNGPROGRAMMIMNG

CHARTCHARTPRESENTED BY

SHILPAN PATEL 231134

JAYENDRA PATEL 231133TAPAS KUMAR 231114SHEKHAR SUMAN JHA 231077VISHRUT 231082

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Prof. Awad Hanna

IntroductionIntroduction

A simple diagram to show locat ion

and t ime at which a certain crew will beworking on a given operat ion.

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CharacteristicsCharacteristics

Shows repet itive nature of the

construction.

Progression of work can be seen easily.

Sequence of different work act ivit ies canbe easily understood .

Have fairly high level of detail.

Can be developed and prepared in ashorter t ime period than other formats.

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LINEAR PROGRAMMING CHARTLINEAR PROGRAMMING CHARTFEATURESFEATURES

A practical deterministic approach ofscheduling

Time-distance relationship No crossing of activitiesTime-space buffer

Time

dist

an

ce

12 3

4 5

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NATURE OF LINEAR REPETITIVENATURE OF LINEAR REPETITIVEPROJECTSPROJECTS

There are two basic categories of repetitiveprojects

vVertical repetitive projects.vHorizontal repetitive projects.

v

vVertical repetitive projects.Progress units are discrete entities

vHorizontal repetitive projects.Progress is continuous and is expressed in terms of

length or location.

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Advantages of LPCAdvantages of LPC

Simple way of presenting time & work completionEasier time and cost optimizationSimple modification, update & changeBetter optimization and management of resourcesBetter forecasting based on actual rate of progress

Disadvantages of LPC

Inability to generate critical pathUsed at repetitive projects onlyNo representation of crew learning effectChart is based on location not system

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Example ProjectExample Project

The project was to connect an existing pipeline to awater treatment plant

Length 1000m

Pipe length 12m Dia.76.2cm Thk. 7mm

Trench - depth 2m width 1.8m

Trench should excavated wider at junction of 1m onboth sides

Total number of required pipes was 84

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Example ProjectExample Project

Since it was difficult to weld pipes inside the trench, pipeswere preliminary welded outside.

Trench should be excavated 288m per day

This production for excavation was 12 pairs of pipes perday.

Welders were divided into two crews. Each crew consistedof two welders, two helpers, and one side boom.

The outside-welding crew was responsible for weldingpipes in pairs outside the trench and the inside-weldingcrew welded those pairs inside the trench.

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Example ProjectExample Project

The production rates of outside-welding and inside-welding crews were 8 welds/day, (to connect 8pairs/day) and 6 welds/day (to connect 12pairs/day since each weld connected 2 pairs of

pipes.) After pipes were welded in the trench, twopainters applied epoxy paint at connections toprevent corrosion. The lead-time between the firstand second paint coats was 1 day to assure thepaint is dry. The duration to apply a coat of epoxypaint is 1 day.

Backfill and compaction was performed by eightlaborers and one front-end loader. The daily outputwas estimated to be 220 cubic meters, which wasconverted to 3 pairs of pipes.

REPORT\lpc\CHART.xls

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THANK YOUTHANK YOU