Sequenza is an Autodesk Revit add-in designed to automate the extraction of construction sequence information from a Revit model and convert it into structured files for 4D construction simulation. It bridges Revit model data with downstream tools such as Navisworks TimeLiner and 3ds Max by generating the task, component, and animation data needed to build a construction timeline.
Core Purpose
The primary purpose of Sequenza is to eliminate the manual effort required to create construction sequence data for 4D workflows. Instead of building Navisworks TimeLiner task hierarchies and element assignments by hand, users can generate structured CSV outputs directly from the Revit model. This allows project teams to spend more time refining the actual construction logic and less time assembling the underlying data structure.
Model Reading and Grouping Workflow
Sequenza reads the active Revit project and organizes model elements by level and category. This grouping creates a practical construction-oriented structure that reflects how work is commonly planned and sequenced in the field. By grouping elements into level-category packages, the tool can generate a manageable hierarchy for construction simulation while still preserving a clear relationship between model elements and schedule tasks.
As part of the process, Sequenza assigns shared parameters that encode each element’s position in the construction timeline. These parameters help identify sequencing information inside the Revit model and support consistent export into the downstream simulation files.
Export Outputs
Sequenza generates three primary output files for 4D coordination and visualization. The Simulations Identification CSV is used for importing tasks into Navisworks TimeLiner. The Simulations Components CSV links Revit model elements to those construction tasks, creating the relationship between the geometry and the timeline. The MaxScript Animation file supports playback in 3ds Max, allowing the exported sequence to be used for animated construction visualization.
Sorting Editor and Sequencing Control
A built-in sorting editor allows coordinators to refine the construction order for any level-category group before generating the final export. This gives users control over how grouped elements are sequenced rather than relying only on default model order. The editor supports a visual gradient preview and live Revit viewport highlighting, making it easier to understand the proposed construction order before committing to the output files.
Six sorting methods are available: ElementId, ProximityToORI, XYZPrint, YXZPrint, ZXYPrint, and ZYXPrint. These options support different sequencing strategies based on element identifiers or spatial directionality. ProximityToORI is especially useful for structural packages that are built outward from a core, access point, or construction starting location.
ORI Anchor System
The ORI anchor system allows users to designate any element as the construction start point for proximity-based sequencing. Once an ORI element is selected, Sequenza can order other elements based on their distance from that anchor. This supports realistic construction strategies where work radiates outward from a core, crane location, entry point, grid intersection, or other meaningful project reference.
Use Cases
BIM coordinators, 4D simulation specialists, and project managers can use Sequenza to accelerate the creation of Navisworks TimeLiner task structures and model element assignments. On large projects with hundreds of level-category groups, manually building a TimeLiner hierarchy can take days. Sequenza can produce the required structure in minutes, allowing the project team to focus on reviewing sequence logic, adjusting construction assumptions, and preparing simulation deliverables.
Supported Scope
Sequenza supports 25 Revit element categories covering major structural, architectural, MEP, and specialty equipment elements. This broad category support allows the add-in to address the full construction programme, from foundations and structural framing through enclosure, services, interiors, and fit-out. Because it works from model elements already present in the Revit project, it can help convert coordinated design data into sequencing information suitable for downstream simulation.
Key Features
- Automates CSV export for Navisworks TimeLiner and 3ds Max workflows.
- Generates task and component assignment data without manual TimeLiner task entry.
- Groups elements by level and category to create a construction-oriented hierarchy.
- Provides six sorting methods: ElementId, ProximityToORI, XYZPrint, YXZPrint, ZXYPrint, and ZYXPrint.
- Includes an ORI anchor system for proximity-based sequencing from a selected starting element.
- Provides visual gradient preview and live Revit viewport highlighting in the sorting editor.
- Supports 25 Revit element categories across structural, architectural, MEP, and specialty scopes.
- Creates a SimulationConfig.json audit file documenting the settings used for each generation run.
- Includes a MaxScript Animation template for 3ds Max that is ready to run on standard exports.
Auditability and Repeatability
Sequenza creates a SimulationConfig.json audit file that records the exact settings used for each generation run. This improves transparency and repeatability by allowing teams to review how a sequence was generated, confirm which sorting methods were applied, and maintain a record of the export configuration used for coordination or presentation deliverables.
Practical Value
Sequenza provides a practical automation bridge between Revit model data and 4D construction simulation workflows. By extracting level-category groups, assigning timeline-related parameters, generating Navisworks-ready CSV files, and producing a 3ds Max animation script, it reduces the time required to prepare construction sequencing deliverables. For BIM and 4D teams, the add-in helps replace repetitive data-building tasks with a faster, more controlled workflow focused on validating and refining the construction sequence.
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