diff --git a/README.md b/README.md
index 7d242bc2b..060bc4df8 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,8 @@
CovsirPhy is a Python library for infectious disease (COVID-19: Coronavirus disease 2019, Monkeypox 2022) data analysis with phase-dependent SIR-derived ODE models. We can download datasets and analyze them easily. Scenario analysis with CovsirPhy enables us to make data-informed decisions.
+
+
## Inspiration
* Monitor the spread of COVID-19/Monkeypox with SIR-derived ODE models
diff --git a/docs/dfd/covsirphy_dfd.png b/docs/dfd/covsirphy_dfd.png
new file mode 100644
index 000000000..087aad5f9
Binary files /dev/null and b/docs/dfd/covsirphy_dfd.png differ
diff --git a/docs/dfd/covsirphy_dfd.pptx b/docs/dfd/covsirphy_dfd.pptx
new file mode 100644
index 000000000..ace3a93b9
Binary files /dev/null and b/docs/dfd/covsirphy_dfd.pptx differ