Joint Committee on Electronics in Construction
The Joint Committee for Electronics in Construction (GAEB) has had the task of promoting rationalization in construction using data processing since 1966.
The GAEB has been incorporated as a main committee in the German procurement and contract committee for construction services (DVA) since January 1, 2005 . The basics of the work of the GAEB are anchored in the statutes of the DVA. As of May 2019, the chairman of the GAEB main committee is Dipl.-Ing.Herbert Rheinberg from the construction and real estate company NRW - Federal Construction Department. The management is based at the Federal Institute for Building, Urban and Spatial Research (BBSR) in the Federal Office for Building and Regional Planning (BBR) in Bonn.
tasks
The GAEB main committee (HA GAEB) currently oversees 82 service areas of the standard service book - STLB-Bau as well as 29 service areas of the STLBBauZ (temporary contract work) in the area of VOB-compliant construction work texts. The innovative further development takes place in approx. 100 specialist working groups and project groups made up of approx. 650 volunteer experts.
The task of the GAEB is the creation and revision
- of the standard construction work book (STLB-Bau) with standardized texts for the description of construction work for new construction, maintenance and renovation
- the standard service book with standardized texts for the description of construction work for temporary contract work (STLB-BauZ)
- sets of rules for the electronic D atenaustausch and A TRUCTURE of service specifications (GAEB DA). With the "Structure of the service specifications" and the "dv-technical schema XML", it provides the standardized interface for the exchange of technical information between those involved in the construction. According to the study "Quality assurance of the GAEB data exchange for the implementation of construction tasks by public clients", a construction volume of around 80 billion euros was transferred in 2006 using GAEB data exchange.
- of V experiencing b esch friction for the electronic volume and project accounting (GAEB VB). In it, regulations for the billing of construction work and geometric solutions for typical billing tasks are developed, updated and harmonized. The aim is to achieve the same results independently of one another with the same output data at different points.
The aim of the GAEB is to enable efficient tendering, awarding and accounting (AVA) of construction work. The conformity with the technical regulations of the German Institute for Standardization eV ( DIN ) and the procurement and contract regulations for construction services ( VOB ) must also be observed.
GAEB data exchange
In different phases of the AVA process, the data exchange between the participants is necessary both technically, in the form of an exchange between different construction accounting programs, and in terms of process automation of the processes. The data exchange is a supplement to the transfer of documents such as B. the original , the specifications or a legally binding offer . This functionality is realized by the "GAEB data exchange XML", as a standardized exchange of construction information via the GAEB interface. In 2009 the GAEB DA XML was introduced. This format is a further development of GAEB DA (1985), GAEB 90 (1990) and GAEB 2000 (1999), which were based on the ASCII format. Processes such as electronic procurement (e-procurement) are based on GAEB DA XML. This exchange procedure also enables the use of word processing and image elements. Here comes XML as an exchange language used. The basis of the electronic data exchange with GAEB DA XML are the schema files (.xsd) issued by GAEB. Since the GAEB DA XML 3.3 version published in 2019, it has been possible to connect referenceable LV objects with BIM models.
Exchange phases in GAEB DA XML
The following data exchange phases are described in the technical documentation GAEB DA XML:
- X31 Quantity takeoff - Quantity takeoffs according to the regulations for electronic construction accounting (REB) 23.003
- X80 LV catalog - For example, a neutral user specification sheet, based on specialist areas or trades, as a source for object-related specification sheets (LV).
- X81 Description of services - The description of services consists of the building description , the specifications and the necessary attachments. The course always consists of the descriptions of the partial performances with their attributes sorted by ordinal numbers. As a rule, it does not contain any prices (exception: temporary contract work ).
- X82 Cost approach - The cost approach consists of the specification of services with estimated prices and is used for awarding decisions. At the same time, it is the basis for cost control during construction when it is updated.
- X82Z service description (temporary contract work)
- X83 Request for offer - After technical coordination, the list of services without prices (exception: temporary contract work) will be forwarded to the companies interested in the execution of the construction work with the request to submit an offer. This phase also includes supplements.
- X83Z request for quotation (temporary contract work)
- X84 Submission of tenders - The bidders who take part in the bidding process complete the specification of services with their prices, bidder text supplements and free quantities and send it back as an offer to the tendering authority. The time of the submission of the offer is fixed in the request for offer. This phase also includes supplements.
- X84P price comparison
- X84Z submission of tenders (bidding and bidding procedure, temporary contract work)
- X85 Side offer - In addition to the main offer, the bidder can submit a side offer with alternative types of execution. The client decides whether a supplementary offer is permitted. This phase also includes supplements.
- X86 Placement of orders - On the basis of the offers submitted by the bidders and evaluated by the client, the contract for the execution of the construction work is placed with the bidder with the most economical offer. The construction contract between the client and the contractor is thus concluded. This phase also includes supplements.
- X86ZR framework order (temporary contract work)
- X86ZE individual order (temporary contract work)
- X87 order confirmation
- X89 Invoice - The invoice is transferred with the associated service and quantity estimates; possibly including the payment history from previous invoices. The quantities can also be documented at this point by measurements (for example REB 23.003, regulations for electronic construction accounting ).
- X31 quantity takeoff
- X50 construction cost catalog
- X51 cost calculation
- X52 calculation data
- X93 trade price request
- X94 trade price quote
- X96 trade order
- X97 trade order confirmation.
Quality management
The “BVBS data exchange” working group in the BVBS (Bundesverband Bausoftware eV) regularly takes care of quality management in the GAEB environment. The BVBS leads u. a. also through GAEB certifications . This is carried out as software certification. There are GAEB certifications for the areas of "construction", "AVA" and "quantity determination".
In 2007, the Federal Ministry of Transport, Building and Urban Development commissioned the study “Quality assurance of GAEB data exchange for the implementation of construction tasks for public clients”. On the basis of the knowledge gained, recommendations were listed separately according to organizational units, which enable the client to carry out the necessary improvements.
Web links
- Official website of the GAEB
- Wilhelm Veenhuis: The free GAEB book. August 1, 2017, accessed February 2, 2020 .
Individual evidence
- ↑ William Veenhuis: The Free GAEB book. August 1, 2017, p. 50 , accessed on February 14, 2020 .
- ↑ DVA Guide to Antitrust Law. (PDF, 115KB) Federal Ministry of the Interior, Building and Home Affairs, November 9, 2018, accessed on February 14, 2020 .
- ↑ a b c d annual work program of the HA GAEB. (PDF, 75KB) Federal Ministry of the Interior, Building and Home Affairs, March 21, 2018, accessed on February 14, 2020 .
- ^ Board of the DVA. (PDF, 75KB) Federal Ministry of the Interior, Building and Home Affairs, May 17, 2019, accessed on February 14, 2020 .
- ↑ GAEB-DA-XML-Flyer. bvbs.de, April 1, 2018, accessed on February 14, 2020 .
- ↑ Professional documents GAEB DA XML 3.2. bvbs.de, April 11, 2013, accessed on February 14, 2020 .
- ↑ a b technical documentation GAEB DA XML 3.3. gaeb.de, May 30, 2019, accessed on February 14, 2020 .
- ↑ William Veenhuis: The Free REB book. July 1, 2017, accessed February 14, 2020 .
- ↑ Certifications. BVBS - Bundesverband Bausoftware eV, accessed on July 14, 2019 .
- ↑ Quality assurance of the GAEB data exchange for the execution of construction tasks for public clients. irbnet.de, accessed on February 14, 2020 .