Construction management Parte A + B - Voto 30

RAPPORTO GIORNALIERO DI CANTIERE IDERBAROMACANTIERE 40003/03/2002

G/DATARIL E VATORE GE OM. ROSSI

CONDIZ. TE MP O S E RE NOF AS E 1.01 1.02

Activities for which we have to determineAA how the resources are going on

MATURI Rcrizione MURATTIVITA' R ITROTE ILASTTO ARCONTRdes A PGE OSPMANODOP E RAID NOME QUAL. TOTOp.Q 8h

Bianchi Paolo Op.S . 8h

Workers 2 Verdi Luca Man. 8h

Neri Simone

If I want to do a real control management I have to collect data from

WBS, it's so important, it doesn't finish with scheduling.

It's in the middle of control management: to manage the consume and

attribute the resources.

WBS is the match between estimation and conspumtion.

8Giuseppe Rigamonti -I.2a INTERNAL DOCUMENTS: EQUIPMENT TIMESHEET - machines. REGISTERED DAILY BY SITE DIRECTOR. MACHINE TYPE. HOURS OF USAGE OF THE MACHINE. ACTIVITY/PHASE INVOLVED BY THE USAGE. NAME OF THE WORKER WHO USED THE MACHINE

ADMINISTRATION FUNCTION OPERATIONAL-TECHNIC

CANTIERE ore FASE

7.00 7.30

7.30 8.00

8.00 8.30

MILANO - TRASPORTO CASSERI ERBA V.ROMA 2h E.UF.01.P1

8.30 9.00

9.00 -

- 9.00

9.30 -

- 9.30

10.00 - ERBA

10.00 10.30

10.30 11.00

ERBA - XXXXX YYYYY 30min ZZ.QQ.WW

11.00 11.30 - COMO

11.30 12.00

12.00 12.30

12.30 13.00

13.00 13.30

13.30 14.00

14.00 14.30

14.30 15.00

15.00 15.30

15.30 16.00

16.00 16.30

16.30 17.00

17.00 17.30

17.30 18.00

18.00 18.30

18.30 19.00

OSSERVAZIONI

A 12Giuseppe Rigamonti -I.3 INTERNAL DOCUMENT: INTERNAL DELIVERY DOCUMENTS (stockwarehouse movements – good issue and goods receipts). REGISTERED DAILY BY WAREHOUSE MANAGER OR BY DRIVERS. GOODS TRANSPORTED AND THEIR QUANTITY. COMING SITE. ARRIVING SITE. DATE AND TIME OF THE TRANSPORT. NEW STOCK QUANTITY IN WAREHOUSE

It’s very important to be aware ofwarehouse stock conditions

ADMINISTRATION FUNCTION OPERATIONAL-TECHNIC FUNCTION

REMAINING STO IN WAREHOUSE COMPARE ACTUAL DATA vsESTIMATION

13Giuseppe Rigamonti -E.1 EXT. DOCUMENT: DELIVERY DOCUMENTS (good receipt to be invoiced). SENT BY VENDOR.

MATERIAL DESCRIPTION, QUANTITIES AND COSTS (not always). SITE DIRECTOR ASSIGN DOCUMENT TO ACTIVITY/PHASE

THE INVOICE IS SENT LATER BY VENDORS AND REGISTERED WITHIN 30/60 DAYS

IMPORTANT !!

EVEN IF THE INVOICE IS SENT LATER, THE COSTS OF THE GOODS RECEIVED HAVE TO BE REGISTERED ON THE ACTIVITY/PHASE WHEN GOODS ARRIVE ON BUILDING SITE

NB: THIS IS VERY IMPORTANT

14Giuseppe Rigamonti -E.2/3 EXT. DOC.: INVOICES (sent woth delivery) – WORKS PROGRESS STATUS. SENT BY VENDOR. MATERIAL DESCRIPTION, QUANTITIES AND COSTS. TOTAL COST OF THE PURCHASE. SITE DIRECTOR ASSIGN DOCUMENT TO ACTIVITY/PHASE

IN THIS CASE THE INVOICE IS AVAILABLE AT THE SAME TIME OF THE GOOD RECEIPT PN BUILDING SITE

15Giuseppe Rigamonti -ACTUAL DATA REGISTRATION

They don’t have information about cost

I.1.LABOR TIMESHEET

E.1. DELIVERY DOCUMENTS (good receipt to be invoiced)

I.2.EQUIPMENT TIMESHEET this data is

E.2. INVOICES (sent with delivery)

I.3.INTERNAL DELIVERY complete DOCUMENTS (warehouse mgm)

E.3.WORKS PROGRESS

STATUS

AccurancyLevel Percentage completion doesn’t mean cost, this is the reason why it’s in this part of the graph.

ORDER CONFIRMATION

E.1 E.2

VARIANT MGM

E.3 DURING CONSTRUCTION I.1

I have to register everyday progress of my construction site, but not only, I.2 I have also to manage other items, such as administrative and purchasing.

I.3 Timing (how fast)

low medium high 16

Giuseppe Rigamonti

When control management is done, it’s very important to manage two dimensions: Accurancy + Timing

WORKS LOGBOOK

Daily activity

CONTENTS

ACTIVITIES STARTED during the week and their START DATES.

ACTIVITIES already started and under construction.

ACTIVITIES FINISHED during the week and their FINISH DATES

IT’S IMPORTANT TO LIST SUBCONTRACTORS.

MACHINES available in the building site and who is the owner (COMPANY/RENTAL).

WEATHER EVENTS that had impact on the construction activities (delay, etc.).

PICTURE REPORT at least for the most important work phases.

NOTES concerning special events

sereno.

ANNOTAZIONI:...

PR04 PR04 18Giuseppe Rigamonti -WORKS LOGBOOK

MAIN FEATURES

The glossary is initially defined in WBS (= index of project execution).

DATA SHOULD BE REGISTERED AT LEAST ON WEEKLY BASIS.

CONTROLLING DOCUMENT USEFUL FOR EACH OPERATOR WORKING ON SITE.

USEFUL TO IMPROVE DATA ACQUISITION LIKE A «REMINDER»FASTERMORE ACCURATED

19Giuseppe Rigamonti -GAP ANALYSIS

Matching of two types of data

DATA TYPE

ESTIMATION DATA ACTUA DATA

BoQx RA = TRC ACTUAL DATA COMING FROM

BUILDING SITE

RESOURCES ESTIMATED RESOURCES USED

List of resources estimated List of resources really consumed

COMPARISON = GAP ANALYSIS

The comparison between these two lists is GAP ANALYSIS

20Giuseppe Rigamonti -Programmazione e Controllo di Gestione della Commessa - MODLO CGAP ANALYSIS

PRECONDITION ESTIMATION AND ACTUAL DATA SHOULD BE WBS

ARRANGED USING SAME CRITERIA/STRUCTURE

GOAL FIND THE MAIN CAUSES OF COST DIFFERENCES

FIND THE ORIGIN OF THE VARIANCE – TOP-DOWN ANALYSIS

What is the origin?

STARTING FROM UPPER LEVEL VARIANCE

ORIGIN COULD BE A DIFFERENCE ON QUANTITY OR ON UNIT COST

DRILLING DOWN TO DETAILED LEVELS Which are the causes?

AS SOON AS THE REASON OF THE GAP IS DETECTED THE ANALYSIS PROCEED LOOKING VARIANCE CAUSES

FOR THE 21Giuseppe Rigamonti -TOP-DOWN ANALYSIS

1. TOTAL COST OF THE PROJECT
2. COSTS OF OPERATIONAL MACRO-PHASES II WBS LEVEL
3. COSTS OF WORK PHASES BELONGING TO THE SAME MACRO-PHASE III WBS LEVEL
4. COSTS OF THE ACTIVITIES BELONGING TO THE SAME PHASE IV-V WBS LEVEL
5. COSTS OF EACH KIND OF RESOURCES BELONGING TO THE ACTIVITY Lab, Equip, Sub, ..
6. COSTS OF THE SPCIFIC RESOURCE BELONGING TO THE SAME Skilled, semi-sk., ..RESOURCE CATEGORY
7. UNIT COST AND QUANTITY OF THE SPECIFIC RESOURCE 22Giuseppe Rigamonti -GAP ANALYSIS

EXAMPLE

OP.50. (WBS final level)

Corpo in aggetto zona ribalte - CA

Estimated Cost Actual cost

16.300.000 21.500.000

+32% THIS IS THE GAP

MANLAB WOOD STEEL CONCCLS EQUIP VAR

+52% -2% +5% +38% +7% 0%

Q Cun CONCCLS CLS

+44% +8% +44% -6%

Q Cun

The number of people +52% -8% for executed this part

of the building had been 44% more than the one By the way the unit cost was less 23 initially estimated

Giuseppe Rigamonti - GAP ANALYSIS RESULTS

1. Differences due to errors quantity calculation in the bill of quantity
   IMPROVE MEASUREMENT CRITERIA
2. Differences on cost per unit
   VENDOR EVALUATION AND MARKET RESEARCH
3. Differences due to performances of labor or machines
   EVALUATE IF IT WOULD BE BETTER TO USE SUBCONTRACTORS OR RENTALS
4. Differences due to logics used during acquisition not aligned to estimation
   IMPROVE THE WAY TO BUILD WBS

Giuseppe Rigamonti - ASTATISTICAL DATA CONCERNING EFFORT AND B C WORKLOAD DURING PROJECT MANAGEMENT M D (case of study) E ESTIMATION PHASE

(A) DmeAR/CF 5%

P.1 List of activities and WBS 4% 27% MPMcWorks scheduling [MPM]

P.2