the art of estimating Beyond BIM Development Code

the art of estimating Content q q q q q Who is Peggy Bovens ? What is Bouw. Data© ? § Methodology § Eight agreements Research questions Standards explored Development Code versus ISO 12006 -2 How many m² are there in our building ? Functional zones in the concept phase Classification of the net room area Implications for software Testcase All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Who is Peggy Bovens ? Subcontractor q q q q 1992 – afgestudeerd burgerlijk ingenieur architect UG 1992 – 1993 : assistent manager bij Interlit nv (faling) 1993 – 1994 : inkoper Ilegems nv (reorganisatie) 1994 – 1998 : werkvoorbereider incl. stabiliteitsberekeningen Eurobeton nv (zusterfirma Ilegems nv) 1998 – 2003 : calculator Antwerpse Bouwwerken nv 2003 – 2006 : hoofd studiedienst ibens nv 2006 tot heden: zaakvoerder PB calc & consult bvba Future owner All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating What is Bouw. Data© ? q q q 2008 KMO Innovation Project – IWT (nr. 080429) Goal: IFRS* for the building industry Budget control = communication = quality Consists of a methodology and 8 agreements Based on available standards Evolves according to new standards * International Financial Reporting Standards All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Methodology 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Project guideline Groupware The active future owner Objective & accurate meeting reports Strict meeting schedule Top-down quantity survey for the designers and LCC Bottom-up working entities for the constructors Planning Diary of the works on site Invoicing and budget control Alterations As built for the facility managers and future owner http: //www. bouwdata. net/nieuwe-inzichten-en-ervaringen/bim-in-12 -stappen All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Eight agreements 1. 2. 3. 4. 5. 6. 7. 8. Development Code Object Code Material Code Phasing Costs Document management Groupware Quantities and units All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Research questions q How many m² are there in our building ? q Standard procedure for defining functional zones in the concept phase ? In Dutch “het vlekkenplan”. q Ratio between total floor surface built and total of the net room area’s ? q Ratio between total of the net room area’s and total of net room area’s which can be rented or sold ? q Retrieving knowledge for the contractor in charge of the interior alterations wanted by individual buyers ? q Retrieving knowledge for the facility manager or future owner while using the building ? All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Standards (to be) explored q ISO 12006 -2 : 2015 Building construction Organization of information about construction works Part 2: Framework for classification q BB-Sf. B (plus) : 1990/2008 q Cunico Classification System (CCS): February 2012 q Uniclass : January 2017 q NEN 2580: 2007 nl Oppervlakten en inhouden van gebouwen - Termen, definities en bepalingsmethoden q NBN EN 15221 -6 : 2011 Facility Management - Deel 6: Metingen van oppervlakte en ruimte in Facility Management http: //www. bouwdata. net/nieuwe-inzichten-en-ervaringen/meting-vanoppervlakte-nen-2580 -versus-en-15221 -6 -who-wins All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Development Code versus ISO 12006 -2 All rights reserved by

the art of estimating How many m² are there in our building ? q NBN EN 15221 -6 : 2011 Facility Management - Deel 6: Metingen van oppervlakte en ruimte in Facility Management Ø No round-off differences Ø Facility manager = stakeholder longest present q Break-down structure Problem: the net room area is not know in the concept phase ! All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Functional zones in the concept phase q The Netherlands: “gebruiksfuncties” in the “Bouwbesluit” Ø 12 “gebruiksfuncties” Ø For each “gebruiksfunctie” = a set of rules concerning design and technical installations Ø When these set of rules are followed, one can build Ø Only definition, no coding q ISO 12006 -2: Ø construction complex = an aggregate of entities Ø construction entity = an independent unit of the built environment with a characteristic spatial structure, intended to serve at least one function or user activity All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Functional zones in the concept phase q BB-Sf. B: Ø Tabel 0 Ø hardly used and seemingly forgotten in Europe q Uniclass (Great Britain): Ø Classification for complexes & classification for entities Ø Messy & useless q Cuneco Classification System (CCS – Denmark): Ø Only Classification for entities Ø Usable All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Functional zones in the concept phase LA_AA LA_AB LA_AD LA_AE LA_AF LA_AG LA_AH LA_AJ LA_AL LA_AN LA_AP = = = level level level area area area for for for the the the “woonfunctie” (residential) “logiesfunctie” (lodge) “celfunctie” (cel) “ kantoorfunctie” (office) “industriefunctie” (industry) “winkelfunctie” (shopping) “onderwijsfunctie” (education) “gezondheidsfunctie” (health) “sportfunctie” (sport) “bijeenkomstfunctie” (meeting) “overige gebruiksfunctie” (other) Important ! The functional zones need to be connected The 12 th “gebruiksfunctie” is for constructions whom are not a building (e. g. a fence) to all the materials, labor, equipment and subcontractors throughout the whole construction phase in order to gain knowledge for the next project ! All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Classification of the Net Room Area q ISO 12006 -2: demands a classification for built spaces Ø NBN EN 15221 -6 : 2011 § 4 classes and suggestions in the annex Ø BB-Sf. B : 1990 – column 9 of tabel 0 § 2 levels (not consistently) § 39 kind of spaces on level 2 Ø Uniclass (Great Britain): § 3 levels § 658 kind of spaces on level 3 Ø Cuneco Classification System (CCS – Denmark): § 3 levels § 89 kind of spaces on level 3 All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Classification of the Net Room Area “kitchen” Ø CCS: Ø Uniclass: “bedroom” Ø CCS: no result alternative Ø Uniclass: All rights reserved by PB calc & consult AEA Kitchen SL_35_60_56 non-domestic kitchen SL_45_10_23 domestic kitchen SL_45_10_44 kitchen-dining rooms AAA Room SL_45_10_08 bedroom-studies SL_45_10_09 bedrooms SL_45_10_57 nursing home bedrooms www. bouwdata. net

the art of estimating Implications for software q Valid for ALL projects Ø break-down list from Level Area towards Net Room Area according the NBN EN 15221 -6: 2011 Ø for Level Area: selection list with the 11 “gebruiksfuncties” according the “Bouwbesluit” in the concept phase Ø for Net Room Area: selection list with spaces in the design phase: 6 possibilities ! CCS level 1, CCS level 2, CCS level 3 Uniclass level 1, Uniclass level 2 or Uniclass level 3 This is to be discussed in Cluster BIM All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Implications for software q Valid for ONE SPECIFIC project Ø Numeric [Exxx] Ø Numeric [Sxxx] Ø Numeric [Zxxx] Ø Numeric [Bxxx] Ø Numeric [Axxx] selection list with the entities of the project selection list with the storeys of the project selection list with the departments of the project selection list with the rooms of the project selection list with the activity spaces of the project E/S/Z/B/A Code used in CCS All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Testcase Motto: monkey proof & free software q Project: Ø Converting an old school to rental property Ø Currently waiting for the building permit All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Testcase q Owner: Ø Actively involved independant home nurse Ø Wants a hands on / no nonsens approach Ø Wants to keep control on budget & timing Ø 0, 5 day coaching by Peggy Bovens q Documents received from architect: Ø Drawings in dwg and pdf format q Software available: Ø Dwg True View 2013 Ø Spreadsheet (Microsoft Excel) All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Test case q Noted while measuring: Ø The translation from CCS to English is sometimes confusing; one needs to read the definitions Ø The rule of NBN EN 15221 -6 concerning stair cases is not allways compatible with what you expect at net room area. The result of PWA = NFA - NRA per floor might be different from measuring PWA separately Ø The renovation project is complex (small rooms with inclined rooftops) and should be managed or with constant presence of the owner on site or with a thorough BIM model All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Testcase – LA “division” concept phase All rights reserved by

the art of estimating Testcase – LA“breakdown” design phase Seems to be the expected ratio of 10 years ago BUT: No additional walls in front of existing walls No technical shafts Thin walls between the appartments All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Testcase – Net Room Area - CCS level 3 All

the art of estimating Testcase – Net Room Area - CCS level 2 CB = storage for bicycles, tools, cleaning material, … DB = room for the installation of central heating & warm water in the appartments All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Testcase – Net Room Area - CCS level 1 All

the art of estimating Testcase – Net Room Area – Zones 91% of the

the art of estimating Testcase The broker wants to sell app no 2 and needs a list of the rooms Ø select in “opmetingstabel” in column “Zone” : “Z 2 app 2” Ø select in “opmetingstabel” in column “Storey” : “S 2 gelijkvloers” Ø result in cel T 2: 75, 88 m² and a list of the rooms involved including the CCS code level 3 All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Testcase Client X wants the tiles in the first bedroom of her app no 1 to be replaced by carpet Ø select in “opmetingstabel” in column “Zone” : “Z 1 app 1” Ø select in “opmetingstabel” in column “Built Space” : “B 17 slaapkamer 1 app 1” Ø result in cel T 2: 10, 08 m² ATTENTION: Development Coding only involves floor surfaces For information concerning e. g. walls to be painted in a particular room or floor, one also needs the Object Code / Construction Elements according to ISO 12006 -2 All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating Conclusion q Take quantity survey seriously q We urgently need one standard for all q All key partners involved during the life cycle of a building need to commit to this standard q Otherwise one never will: Ø Control the budget Ø Gain accurate knowledge for future projects All rights reserved by PB calc & consult www. bouwdata. net

the art of estimating q www. bouwdata. net q Forum “The Art of Estimating”: https: //www. linkedin. com/groups/4558557 q Contact Peggy Bovens Mobile: +32 (0)498 91 98 96 Mail: info@bouwdata. net All rights reserved by PB calc & consult www. bouwdata. net