diff --git a/README.md b/README.md
index 96b346a..7e28be1 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@ We used [MIT License](LICENSE) because it is simple, permissive and encourages d
 - Team Members/Developers: Chikith Rishi Maddi, Vishakha Mathur, Samuel Keun
 
 ## Contact
+- Ming-Dao Chia (Ming-Dao.Chia@anu.edu.au)
 
 ## Installation and Setup
 
@@ -63,6 +64,15 @@ The system requires two primary inputs:
 - Metadata CSV file
 - Raw hyperspectral .sig measurement files
 
+### Input formatting
+
+- Example raw .sig file data can be found in [sig_files](data/example_data/example1/sig_files)
+
+- Example metadata csv file can be found in [example1](data/example_data/example1/metadata.csv)
+
+- Example Location file can also be found in [example1](data/example_data/example1/positions.csv)
+
+
 Recommended folder structure:
 
 ```text
@@ -157,17 +167,104 @@ Using absolute / full file paths (supported irrespective of file location):
 
 ```
 
-#### Metadata File Path
+## Sample and Test Data
+
+Example data is available in [`data/example_data`](data/example_data). It contains:
+
+* metadata CSV files;
+* SVC `.sig` hyperspectral measurements; and
+* location files used to arrange measurements in the heatmap.
+
+Run HyperKey with the example dataset:
+
+```bash
+python hyperkey.py data/example_data/example1/metadata.csv \
+  -r data/example_data/example1 \
+  --outlier-analysis
+```
+
+Run the automated test suite after system changes:
+
+```bash
+pytest --cov=scripts --cov-report=term-missing
+```
+
+These tests verify file matching, path handling, report generation and other expected pipeline behaviour.
+
+## Validation and Quality Assurance
+
+HyperKey currently uses automated tests and manual output inspection for functional validation.
+
+The following checks are performed:
+
+* metadata rows are matched with the expected `.sig` files;
+* missing, blank and invalid file numbers are reported;
+* output files are created in both default and custom locations;
+* NDVI uses the spectral bands nearest to the required red and near-infrared wavelengths;
+* Markdown, HTML and PDF reports contain consistent processing results;
+* outlier listings are checked against the generated outlier CSV; and
+* CI runs the test suite whenever changes are pushed.
+
+
+## Technical Documentation
+
+HyperKey uses a modular Python workflow:
+
+| Component                  | Responsibility                                                          |
+| -------------------------- | ----------------------------------------------------------------------- |
+| `hyperkey.py`              | User-facing entry point                                                 |
+| `workflow.py`              | Coordinates all processing stages                                       |
+| `pipeline.py`              | Validates metadata, finds `.sig` files and creates merged spectral data |
+| `visualise_heatmap.py`     | Calculates the selected vegetation index and generates a heatmap        |
+| `visualise_measurement.py` | Generates spectral-reflectance graphs                                   |
+| `outlier_analysis.py`      | Detects and exports unusual spectral measurements                       |
+| `report.py`                | Generates Markdown, HTML and PDF reports                                |
+
+The workflow follows these stages:
+
+1. Validate the supplied paths and metadata.
+2. Match metadata rows with `.sig` measurements.
+3. Create the merged spectral CSV and processing summary.
+4. Generate the heatmap and spectral graph.
+5. Run optional outlier analysis.
+6. Generate Markdown, HTML and PDF reports.
+
+Output paths are resolved centrally and passed to each module. This allows the same workflow to support both the default output directory and a custom path supplied with `-o`.
+
+## Version History
+
+### Unreleased
+
+* Added custom output paths.
+* Added optional outlier analysis.
+* Added outlier listings to Markdown, HTML and PDF reports.
+* Added print-friendly HTML report styling.
+* Replaced Playwright and Chromium with fpdf2 for PDF generation.
+* Improved unique output filenames to prevent overwriting.
+
+
+### Initial Prototype
+
+* Added metadata and `.sig` file matching.
+* Added merged spectral CSV generation.
+* Added NDVI heatmaps and spectral-reflectance graphs.
+* Added basic Markdown, HTML and PDF reports.
+
+For detailed development history, see the repository’s [commit history](https://github.com/appn-anu/hyperkey/commits/main) and [releases](https://github.com/appn-anu/hyperkey/releases).
+
+## References
 
-## Input formatting
+1. Rouse, J. W., Haas, R. H., Schell, J. A., and Deering, D. W. (1974). *Monitoring Vegetation Systems in the Great Plains with ERTS*. Third Earth Resources Technology Satellite Symposium, NASA SP-351.
 
-Example raw .sig file data can be found in [sig_files](data/example_data/example1/sig_files)
+2. Montero, D., Aybar, C., Mahecha, M. D., Martinuzzi, F., Söchting, M., and Wieneke, S. (2023). spyndex: A Python package for computing spectral indices. *SoftwareX, 23*, 101341. https://doi.org/10.1016/j.softx.2023.101341
 
-Example metadata csv file can be found in [example1](data/example_data/example1/metadata.csv)
+3. spyndex documentation: https://spyndex.readthedocs.io/
 
-Example Location file can also be found in [example1](data/example_data/example1/positions.csv)
+4. SVC HR-series spectroradiometer documentation: [add the exact manual or manufacturer URL used by the project].
 
+5. fpdf2 documentation: https://py-pdf.github.io/fpdf2/
 
+6. Outlier-detection method: [add the paper or statistical source corresponding to the method implemented in `outlier_analysis.py`].