One of the advantages of designing with coordination models is more efficient design. Part of the planning can be done during the meeting process and provides a more direct process. Instead of creating traditional meeting minutes, corrections can be made in meetings by referring to places in the model with a direct inscription. To achieve this, the project must prepare routines for how participants in the project will deliver data, format of transfer files, responsible for deliveries of various subjects, time and deadline for deliveries to meetings.

The delivery includes basic models, subject models, coordination model and display model for all relevant subjects for the planning phase, with the necessary level of detail for the planning phase. It is pointed out that the delivery includes all interaction versions up to the finally accepted model.

The design should, unless otherwise agreed, build on any models that already exist from previous study and planning phases. Existing models are detailed and further enriched with information. The model includes both permanent facilities and temporary facilities to describe the implementation of the measure.

A project / assignment-specific strategy should be established for the use of models at the start of the project. The strategy should be adapted to the project's scope and should at least include specific objectives for model use in the project, a plan for tool use and possible training of project participants, role descriptions for model managers in the project, a plan for which types of models should be used in which meetings and contexts. plan for level of detail and data flow in the project. It must also, in consultation with the client, assess any need within each individual subject area for conventional drawings in addition to the models.

It must be taken into account that the model is also used as a basis for illustrations, visualizations, and that these are applied to map data, draped with a map basis, orthophoto, etc. If illustrations, visualizations or the like are prepared for public communication purposes, the designer is obliged to take the necessary precautions in descriptions of consequences for third parties.

The coordination model shows an updated collection of the professional models and basic data, with the correct placement of all elements and objects that have been projected at any given time.

Such an interdisciplinary coordination model has the advantages of:

• Greater understanding and respect for each other's subjects and limitations.
• Easier to identify conflict and problems that may arise during the implementation and construction of the facility. Visualizes area and volume requirements in the project, and possible conflict with the location of the objects, during the design phase. Reduces the need for changes and redesign during the construction phase.
• Higher quality and greater accuracy of what is projected. Designers must add more details and accuracy to the design so that the model looks as realistic as possible. Errors in the design are clear. A better design basis benefits the executing contractor who does not have to make adjustments on site. Ensure the possibility that the project is realistic and feasible.
• Form a common platform for interdisciplinary collaboration at design meetings
• Visibility requirements and the visual impression are simulated. Provides the opportunity for designers and possibly architects to design the facility in a visually best possible way for the travelers and to create a uniform and well-thought-out operating environment.
• The contractor receives more information that improves the calculation basis for pricing the assignment. Facilitates the ability to check data in the tender documentation and simulate the operation of the facility. More information creates greater trust between the client and the contractor and additions are prevented as a result of uncertainty and misunderstandings.
• Contractor gets more data for implementation and construction. Data from the model can be used directly on the construction site where all design data is available and easy to put out in the field.
• The model is the basis for increased documentation and control of the finished plant, and forms additional information in a final documentation.
• Provides an opportunity to make visible what the measure entails to the public, landowners and those who are to approve and adopt the plans.

How the result of such a collaboration model is to be used can vary from project to project, depending on the project's size, complexity, knowledge and form of contract.

A model only works when the latest updated data is included in the model. This means that the data flow in the project is important, regardless of who is designing or which programs are used for the design. The transmission of data must be coordinated in a readable format that ensures the quality and accuracy of the data. How this is to be implemented must be agreed in advance through contracts, agreements and guidelines.

Basic models describe existing terrain and situation before the intended interventions have been carried out.

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Subject-specific design shall be defined separately as professional models. These should only show their own subject through specific objects and elements, and should not contain other elements or references to other subjects in the specific subject model. All subject models must use a common reference system and height so that all subject models can be entered directly into an overall model, coordination model without conversion or adjustments.

All subject models must be geographical models in plan / volume with a common reference system that can be used as input in the coordination model. Subject models are built up with all respective academic data with references to the object's or element's protrusion data. All data must have x, y and z coordinates in the given reference system.

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Each professional model must contain the projected system that is shown with surfaces and elements / objects based on the correct extent and location. The projected data in the subject model must be reproduced accurately and unadorned. Errors and omissions with objects must not be hidden or distorted but made visible in the model with warning or symbol.

What is projected shall be defined on the basis of a specific object type code list and structure of layers at all times to ensure the development of the digital data.

All subject models must be geographical models in plan / volume with a common reference system that can be used as input in the coordination model. Subject files are built up with all respective professional data with references to the object's or element's protrusion data. All data must have x, y and z coordinates in the given reference system. If it is to be projected in models, the objects and elements must also have a height reference.

The subject model must be kept up to date along the way, at agreed intervals. Common routines must be prepared for all participants in the design. When versions have been completed for consultation and approval, no changes must be made to professional models. The same applies to deliveries with the tender basis to contractors and building drawing audits.

If there has been a need to add guides or other files in the design, these must be removed before partial deliveries and when the drawing is announced as completed.

The coordination model is a model that brings together all professional models and basic models in one model through links. This forms the basis for looking at the total design regardless of who or which subject has designed or which tool has been used. It is suitable for regular review at design meetings, interdisciplinary controls, and a basis for defining the result model.

The coordination model is formed by putting together all basic models and professional models. It does not need to be drawn or edited in this model. All changes must be made to the subject models and re-generated to the coordination model.

The coordination model shall show the planned interdisciplinary situation in a given phase of the development. The model must be of such a nature that you can move around freely in the model. The model can be built up as a wire model or as a surface, or a combination of these. Subjects, teams or groups must be able to be switched on and off to be able to look under the overlying layers.

The format selected must be able to generate data from all the participating data models, without data being distorted or lost. The size and accuracy must be clarified with the client in advance based on data volumes and visualization tools.

The model is used for design purposes for interdisciplinary visual quality control in design. It can define visualized work tasks and phases during the construction period, and help ensure implementation. It can enhance the visual impression and design of the facility and contribute to an optimization of solutions. The model must be updated regularly, in accordance with updating of professional models, throughout the design phase. As a prerequisite for the project, intervals of 14 days should be set up, unless otherwise defined in the project.

An updated version of the subject model is regularly posted on the agreed catalog, and notification is sent as agreed to the coordinator in advance of design meetings, construction meetings, etc., so that the coordination model always shows the latest and current version at given times.

The coordination model can be the starting point for design meetings where a review of this forms the basis for meeting minutes and interdisciplinary coordination. The need for changes and updates that appear at a meeting is changed and corrected to the next meeting, or by appointment.

It is important that all deliveries in different subjects are coordinated so that an updated model can be reviewed at the agreed design meetings to get the full effect of the design.

Coordination models should be used for various purposes such as results, display, presentation or source model, arranged so that all the current subject models are copied into the model to be developed and all references are removed. The model will thus no longer be updated in the event of changes in the professional model

As a description for construction, the profit model must be adapted as a tender basis and building documentation for the contractor. The model must contain all the elements and objects necessary to describe and build the plant. The model must be adapted for use in order to be able to extract stitching data or for use as machine control, if the contractor so wishes in the production phase. The model is also the basis for control during construction where volumes and location must be shown with any deviations.

The models must be designed so that they can be used for distribution on a tender basis. This applies to the coordination model and the separate subject models. The models must be able to be delivered in the production format and in open formats, and possibly a design format that is commonly used in the construction market.

Where the process is defined as calculated masses, the model shall be adapted to be able to calculate volumes in a model with possibilities for control calculation.

All elements and terrain lines must be clearly marked with points or reference lines.

The model must have good enough geometric accuracy to be able to be used as a basis for stitching and machine control during the construction phase without other additional information.

The result model shall provide access to geometry data and properties The model is delivered in a suitable format and agreed specifically with the client. The format must take care of the object's geometric design (volume / surfaces / lines / points) and properties. When the plant is completed, the model must be updated according to the actual situation. It is the measured data that will be the basis for the placement of objects and elements in the model.

The result models must be delivered with a stitching basis to the contractor. The objects must be delivered in such a way that they are suitable for the production of a stitching base where the reference point and lines are on the correct layer (prefix R). Objects with uniquely defined geometry are delivered as volumes or surfaces. Objects with assumed geometry must also be supplied with reference points / lines for sticking (eg point for center sump, line for bottom inner pipe). 

All objects must be associated with the register of objects. In Bane NOR, this is BaneData's object registration system with a unique object ID. In a planning situation, these objects will be registered in BaneData with the status as PLANNED. When the plant is finished and ready for use, these will have the status IN OPERATION. Object ID is ordered / reserved either through established systems or by contacting Bane NOR.

In the event of changes to existing objects, the existing object ID must be used so that existing information and historical data about objects are continued. The choice of type of object must be made on the basis of requirements in technical regulations, RAMS specifications and experience.

The objects used should, as far as possible, be retrieved from Bane NOR's Object Library. If there are no correct objects in the library, it may be necessary to prepare this in the project. Such an object that is designed in the project goes to Bane NOR free of charge. The object is placed in into the correct place and height.

The objects must show the correct size, extent and appearance. It is important not to use objects that have too high a resolution, are too detailed, or require large digital capacity, as this will mean that the models become unnecessarily large and require a lot of data capacity.

In a design phase, product-specific objects or objects that through a distinctive appearance are not used until the choice of supplier has been chosen must be used.

Bane NOR has established a 3D object library which is under Supplier, requirements and security, Rules, routines, processes, circulars and applications, Digital planning at www.banenor.no. Object library Planners who work for Bane NOR are free to use the library for the design of railway facilities.

All objects must have the opportunity to be carriers of individual properties. The properties must include contribute to a consistent traceability from design, properties of production / supplier, location of object, and system for operation and maintenance. Especially components with great importance for safety and availability must be registered with production / supplier, location in the plant, and data that is important for operation and maintenance. This data is added as information associated with the model. The object properties are partly governed by guidelines in technical regulations, framework agreements, client-delivered material and deliveries given in tenders. The object properties are entered continuously in the model as these are made known. When the model is upgraded to the built level, all relevant object properties must be entered with a corrected location.

As a controlling parameter, all objects and elements that are included in the model are given in a specific structure.

Properties are additional information about the objects. There are currently no systems that link information to the object. How the information can be linked to the model will depend on software solutions. The requirement is that the defined content of data and transfer format is as defined.

Information can not normally be entered directly into the model. Normally, only one object type ID will be in the model.

All Objects entered in the subject model should have two layers:

• Layer 1 - The object marked as a symbol, with surfaces and volume. The team does not have a prefix.
• Layer 2 - Reference point or line of object. The insertion point is also the protrusion data for the object. The team is given with the prefix R- …… in front of the team name.