<h1>
<picture>
<source media="(prefers-color-scheme: dark)" srcset="docs/_static/bw_timex_dark_nomargins.svg" height="50">
<img alt="bw_timex logo" src="docs/_static/bw_timex_light_nomargins.svg" height="50">
</picture>
</h1>
[](https://docs.brightway.dev/projects/bw-timex/en/latest/)
[](https://pypi.org/project/bw-timex/)
[](https://anaconda.org/diepers/bw_timex)
[](https://mybinder.org/v2/gh/brightway-lca/bw_timex/HEAD?labpath=notebooks%2Fgetting_started.ipynb)
This is a python package for [time-explicit Life Cycle Assessment](https://docs.brightway.dev/projects/bw-timex/en/latest/content/theory.html#terminology) that helps you assess the environmental impacts of products and processes over time. `bw_timex` builds on top of the [Brightway LCA framework](https://docs.brightway.dev/en/latest).
## ✨ Features
This package enables you to account for:
- **Timing of processes** throughout the supply chain (e.g., end-of-life treatment occurs 20 years after construction)
- **Variable** and/or **evolving** supply chains & technologies (e.g., increasing shares of renewable electricity in the future)
- **Timing of emissions** (by applying dynamic characterization functions)
You can define temporal distributions for process and emission exchanges, which are then *automatically* propagated through the supply chain and mapped to corresponding time-explicit databases. The resulting time-explicit LCI reflects the current technology status within the production system at the actual time of each process. Also, `bw_timex` keeps track of the timing of emissions which means that you can apply [dynamic characterization functions](https://github.com/brightway-lca/dynamic_characterization).
## 💡 Use Cases
`bw_timex` is ideal for cases with:
- **Variable** or strongly **evolving production systems**
- **Long-lived** products
- **Biogenic** carbon
## 👩💻 Getting Started
- [Installation Guide](https://docs.brightway.dev/projects/bw-timex/en/latest/content/installation.html)
- [Getting Started Tutorial](https://docs.brightway.dev/projects/bw-timex/en/latest/content/getting_started/index.html)
- [Example Collection](https://docs.brightway.dev/projects/bw-timex/en/latest/content/examples/index.html)
## 🤝 Contributing
We welcome contributions! If you have suggestions or want to fix a bug, please:
- [Open an Issue](https://github.com/brightway-lca/bw_timex/issues)
- [Send a Pull Request](https://github.com/brightway-lca/bw_timex/pulls)
## 💬 Support
If you have any questions or need help, do not hesitate to contact us:
- Timo Diepers ([timo.diepers@ltt.rwth-aachen.de](mailto:timo.diepers@ltt.rwth-aachen.de))
- Amelie Müller ([a.muller@cml.leidenuniv.nl](mailto:a.muller@cml.leidenuniv.nl))
- Arthur Jakobs ([artos.jakobs@psi.ch](mailto:artos.jakobs@psi.ch))
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