diff --git a/README.md b/README.md
index f88360b..4b2a7a8 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,24 @@ This code was developed in and depends on Databricks.
 More technical documentation will be added in the future, but for now see [Architechture](docs/architecture.md) and [Features & Upgrades](docs/features_upgrades.md).
 
 Note that there are two other version of this model that are stored in `deprecated/` that are not being maintained. 
+
+## Install
+
+This repo is designed to be run on Databricks. But it is also designed to use
+shared library code from the RA private repo to avoid duplication of utility
+code from one project to another. It follows the conventions described in
+[dml-sample-transmission-line](https://github.com/rewiringamerica/dml-sample-transmission-line)
+so you should read an understand the conventions and usage patterns described in
+the `README.md` found there. We currently run this project on clusters with DB
+14.3 LTS runtime (Python 3.10, R 4.2).
+
+You should add `install-db-requirements.sh` as your cluster init script by uploading it in Advanced Options > Init Script in your cluster menu. The cluster will need to be restarted for changes to take effect. 
+
+### Updating Requirements
+
+Whenever you add a requirement to `pyproject.toml` you need to
+
+1. `poetry update` as normal
+2. generate requirements files with `dml-gen-requirements` as described in the
+   [dml-sample-transmission-line](https://github.com/rewiringamerica/dml-sample-transmission-line)
+   `README.md`
diff --git a/install-db-requirements.sh b/install-db-requirements.sh
new file mode 100644
index 0000000..e12d0e0
--- /dev/null
+++ b/install-db-requirements.sh
@@ -0,0 +1,111 @@
+#!/bin/bash
+#
+# This script is meant to be used as an init script on a Databricks 14.3 LTS
+# cluster.
+
+echo "Running install-db-requirements.sh init script."
+
+TEMP_REQUIREMENTS=$(mktemp /tmp/requirements.txt.XXXXXX)
+cat >"$TEMP_REQUIREMENTS" <<'EOF'
+# The contents of this section should be a copy of requirements-db-14.3.txt.
+# That way this is a self-contained shell script that can install requirements
+# on a Databricks cluster as an init script.
+--extra-index-url https://us-central1-python.pkg.dev/cube-machine-learning/rewiring-america-python-repo/simple
+
+appnope==0.1.4 ; python_version >= "3.10" and python_version < "3.11" and (platform_system == "Darwin" or sys_platform == "darwin")
+colorama==0.4.6 ; python_version >= "3.10" and python_version < "3.11" and (platform_system == "Windows" or sys_platform == "win32")
+cython==0.29.32 ; python_version >= "3.10" and python_version < "3.11"
+databricks-connect==13.1.0 ; python_version >= "3.10" and python_version < "3.11"
+distro==1.9.0 ; python_version >= "3.10" and python_version < "3.11"
+dmlbootstrap==0.1.3 ; python_version >= "3.10" and python_version < "3.11"
+dmlutils==0.7.0 ; python_version >= "3.10" and python_version < "3.11"
+duckdb==1.1.1 ; python_version >= "3.10" and python_version < "3.11"
+et-xmlfile==1.1.0 ; python_version >= "3.10" and python_version < "3.11"
+flask==2.2.5 ; python_version >= "3.10" and python_version < "3.11"
+fsspec[http]==2023.6.0 ; python_version >= "3.10" and python_version < "3.11"
+gcsfs==2023.6.0 ; python_version >= "3.10" and python_version < "3.11"
+gitpython==3.1.27 ; python_version >= "3.10" and python_version < "3.11"
+google-api-core[grpc]==2.15.0 ; python_version >= "3.10" and python_version < "3.11"
+google-cloud-secret-manager==2.20.2 ; python_version >= "3.10" and python_version < "3.11"
+googleapis-common-protos[grpc]==1.62.0 ; python_version >= "3.10" and python_version < "3.11"
+greenlet==3.1.1 ; python_version >= "3.10" and (platform_machine == "aarch64" or platform_machine == "ppc64le" or platform_machine == "x86_64" or platform_machine == "amd64" or platform_machine == "AMD64" or platform_machine == "win32" or platform_machine == "WIN32") and python_version < "3.11"
+grpc-google-iam-v1==0.13.1 ; python_version >= "3.10" and python_version < "3.11"
+imagehash==4.3.1 ; python_version >= "3.10" and python_version < "3.11"
+jinja2==3.1.2 ; python_version >= "3.10" and python_version < "3.11"
+jupyter-core==5.2.0 ; python_version >= "3.10" and python_version < "3.11"
+keyrings-google-artifactregistry-auth==1.1.2 ; python_version >= "3.10" and python_version < "3.11"
+lazr-restfulclient==0.14.4 ; python_version >= "3.10" and python_version < "3.11"
+lazr-uri==1.0.6 ; python_version >= "3.10" and python_version < "3.11"
+lazy-loader==0.3 ; python_version >= "3.10" and python_version < "3.11"
+mako==1.2.0 ; python_version >= "3.10" and python_version < "3.11"
+markdown==3.4.1 ; python_version >= "3.10" and python_version < "3.11"
+markupsafe==2.1.1 ; python_version >= "3.10" and python_version < "3.11"
+mlflow-skinny[databricks]==2.9.2 ; python_version >= "3.10" and python_version < "3.11"
+notebook-shim==0.2.2 ; python_version >= "3.10" and python_version < "3.11"
+openpyxl==3.1.5 ; python_version >= "3.10" and python_version < "3.11"
+pillow==9.4.0 ; python_version >= "3.10" and python_version < "3.11"
+proto-plus==1.24.0 ; python_version >= "3.10" and python_version < "3.11"
+py4j==0.10.9.7 ; python_version >= "3.10" and python_version < "3.11"
+py==1.11.0 ; python_version >= "3.10" and python_version < "3.11" and implementation_name == "pypy"
+pygments==2.11.2 ; python_version >= "3.10" and python_version < "3.11"
+pyjwt==2.3.0 ; python_version >= "3.10" and python_version < "3.11"
+pynacl==1.5.0 ; python_version >= "3.10" and python_version < "3.11"
+pyspark==3.5.3 ; python_version >= "3.10" and python_version < "3.11"
+pytoolconfig[global]==1.2.5 ; python_version >= "3.10" and python_version < "3.11"
+pywavelets==1.4.1 ; python_version >= "3.10" and python_version < "3.11"
+pywin32-ctypes==0.2.3 ; python_version >= "3.10" and python_version < "3.11" and sys_platform == "win32"
+pywin32==307 ; sys_platform == "win32" and platform_python_implementation != "PyPy" and python_version >= "3.10" and python_version < "3.11"
+pywinpty==2.0.13 ; python_version >= "3.10" and python_version < "3.11" and os_name == "nt"
+pyyaml==6.0 ; python_version >= "3.10" and python_version < "3.11"
+radbcluster==14.3.1 ; python_version >= "3.10" and python_version < "3.11"
+secretstorage==3.3.1 ; python_version >= "3.10" and python_version < "3.11"
+send2trash==1.8.0 ; python_version >= "3.10" and python_version < "3.11"
+sqlalchemy==1.4.39 ; python_version >= "3.10" and python_version < "3.11"
+toml==0.10.2 ; python_version >= "3.10" and python_version < "3.11"
+typing-extensions==4.4.0 ; python_version >= "3.10" and python_version < "3.11"
+usingversion==0.1.2 ; python_version >= "3.10" and python_version < "3.11"
+visions[type-image-path]==0.7.5 ; python_version >= "3.10" and python_version < "3.11"
+werkzeug==2.2.2 ; python_version >= "3.10" and python_version < "3.11"
+
+EOF
+
+echo "TEMP_REQUIREMENTS"
+echo "$TEMP_REQUIREMENTS contains:"
+echo ------------------
+cat "$TEMP_REQUIREMENTS"
+echo ------------------
+
+echo
+echo
+
+echo "PIP LIST BEFORE INSTALL"
+python -m pip list
+
+echo
+echo
+
+echo "UPGRADE PIP AND ADD KEYRING SUPPORT"
+
+# Upgrade pip from the default cluster version to a newer
+# version that supports keyring.
+python -m pip install --upgrade pip
+
+# Install keyring support and support for a keyring that
+# knows how to auth to google.
+python -m pip install keyring keyrings-google-artifactregistry-auth
+
+echo
+echo
+
+echo "PIP INSTALL"
+python -m pip install \
+  --index-url https://us-central1-python.pkg.dev/cube-machine-learning/rewiring-america-python-repo/simple \
+  --extra-index-url https://pypi.org/simple/ \
+  --keyring-provider import \
+  -r "$TEMP_REQUIREMENTS"
+
+echo
+echo
+
+echo "PIP LIST AFTER INSTALL"
+python -m pip list
diff --git a/notebooks/Feature Importance Analysis.py b/notebooks/Feature Importance Analysis.py
new file mode 100644
index 0000000..981aae2
--- /dev/null
+++ b/notebooks/Feature Importance Analysis.py	
@@ -0,0 +1,262 @@
+# Databricks notebook source
+# MAGIC %md # Feature Importance Analysis
+# MAGIC
+# MAGIC This notebook performs feature importance analysis for preducting heat pump cost savings across different GGRF communities. This is done by computing SHAP values on a fitted Catboost model.
+
+# COMMAND ----------
+
+# MAGIC %pip install catboost shap
+
+# COMMAND ----------
+
+from itertools import chain
+import matplotlib.pyplot as plt
+import numpy as np
+import pandas as pd
+import sys
+
+import catboost as cb
+import pyspark.sql.functions as F
+from sklearn.model_selection import train_test_split
+import shap
+from cloudpathlib import CloudPath
+
+from dmlutils.gcs import save_fig_to_gcs
+
+# COMMAND ----------
+
+# Define constants and parameters
+FIGPATH = CloudPath("gs://the-cube") / "export" / "sumo_feature_importances"
+
+TEST_SIZE = 0.2
+RANDOM_STATE = 42
+CATBOOST_PARAMS = {
+    "iterations": 300,
+    "learning_rate": 0.1,
+    "depth": 8,
+    "verbose": False,
+    "allow_writing_files": False,
+    "nan_mode": "Max",
+}
+
+# COMMAND ----------
+
+
+def get_catboost_shap_values(X_train, y_train, X_test, y_test, categorical_features):
+    """
+    Train a CatBoost model and calculate SHAP values.
+
+    Args:
+        X_train (pd.DataFrame): Features in train set
+        y_train (pd.DataFrame): Response values in train set
+        X_test (pd.DataFrame): Features in test set
+        y_test (pd.Series): Response values in test set
+        categorical_features (list of str): List of column names of all categorical features
+
+    Returns:
+        tuple: SHAP explanation object and R^2 score of the model
+    """
+    # Fit model
+    cb_model = cb.CatBoostRegressor(**CATBOOST_PARAMS)
+    cb_model.fit(X_train, y_train, cat_features=list(range(len(categorical_features))))
+    model_score = cb_model.score(X_test, y_test)
+
+    # get shap values
+    explainer = shap.Explainer(cb_model)
+    shap_values = explainer(X_train)
+
+    return shap_values, model_score
+
+
+def plot_shap_values(shap_values, fig_title, gcspath, n_feature_display=None):
+    """
+    Create and save a bar plot of SHAP values.
+
+    Args:
+        shap_values (np.array): SHAP values for each feature and sample
+        fig_title (str): Title for the plot
+        gcspath (str): Path to save the figure
+        n_feature_display (int, optional): Number of top important features to display
+    """
+    if n_feature_display is None:
+        n_feature_display = shap_values.values.shape[1]
+    shap.plots.bar(shap_values, max_display=n_feature_display, show=False)
+    plt.title(fig_title)
+    fig = plt.gcf()
+    fig.set_size_inches(12, 9)
+    fig.tight_layout()
+    save_fig_to_gcs(fig=fig, gcspath=gcspath, dpi=200, transparent=False)
+
+
+def fit_and_plot_shap_values(df, categorical_features, numeric_features, target, title_detail, n_feature_display=None):
+    """
+    Fit a CatBoost model, calculate SHAP values, and plot feature importances.
+
+    Args:
+        df (pd.DataFrame): Input dataframe
+        categorical_features (list): List of categorical feature names
+        numeric_features (list): List of numeric feature names
+        target (str): Name of the target variable
+        title_detail (str): Detail to be added to the plot title
+        n_feature_display (int, optional): Number of top important features to display
+    """
+    # Prepare features and target
+    X_categorical = df[categorical_features].astype(str)
+    X_numerical = df[numeric_features].astype(float)
+    X = pd.concat([X_categorical, X_numerical], axis=1)
+    y = df[target].astype(int)
+
+    # Split into train and test sets
+    X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=TEST_SIZE, random_state=RANDOM_STATE)
+
+    # Train model and get SHAP values
+    shap_values, model_score = get_catboost_shap_values(
+        X_train=X_train, y_train=y_train, X_test=X_test, y_test=y_test, categorical_features=categorical_features
+    )
+
+    # Plot and save SHAP values
+    plot_shap_values(
+        shap_values=shap_values,
+        fig_title=f"Feature Importances for HP Savings ({title_detail}): R^2 = {model_score:.3f}",
+        n_feature_display=n_feature_display,
+        gcspath=FIGPATH / f"mean_shap_values_cost_savings_medhp_{'_'.join(title_detail.lower().split())}.png",
+    )
+    plt.show()
+
+
+# COMMAND ----------
+
+# Load and prepare data
+# baseline metadata
+metadata = spark.table("ml.surrogate_model.building_metadata")
+# baseline sumo features derived from metadata
+features = spark.table("ml.surrogate_model.building_features").where(F.col("upgrade_id") == 0)
+# total energy and cost savings for med eff hp
+outputs_savings = (
+    spark.table("building_model.resstock_annual_savings_by_upgrade_enduse_fuel")
+    .where(F.col("end_use") == "total")
+    .where(F.col("upgrade_id") == "11.05")
+    .groupby("building_id")
+    .agg(F.sum("kwh_delta").alias("kwh_delta"), F.sum("cost_delta").alias("cost_delta"))
+)
+
+# COMMAND ----------
+
+# Define communities and their corresponding county GEOIDs
+communities = [
+    ("Pittsburgh", ["42003", "42007"]),
+    ("Rhode Island", ["44001", "44003", "44005", "44007", "44009"]),
+    ("Atlanta", ["13121", "13089", "13067", "13135", "13063"]),
+    ("Denver", ["08001", "08031", "08059", "08005", "08013", "08014", "08035"]),
+]
+
+# Convert county geoids into GISJOINs
+communities_dict = {c: [f"G{geoid[:2]}0{geoid[2:]}0" for geoid in geoids] for c, geoids in communities}
+
+# Invert the mapping to get lookup of GISJOIN to community
+gisjoin_to_community = {gisjoin: community for community, gisjoins in communities_dict.items() for gisjoin in gisjoins}
+
+# Map buildings to communities
+community_mapping = F.create_map([F.lit(x) for x in chain(*gisjoin_to_community.items())])
+metadata = metadata.withColumn("community", community_mapping[F.col("county")])
+
+# COMMAND ----------
+
+# Define target variable
+target = "cost_delta"
+
+# All the features we don't want to include
+# these are just the primary key
+pkey_features = ["upgrade_id", "building_id"]
+# these are duplicative of other features so we don't need them
+cz_features = [
+    "climate_zone_moisture",
+    "climate_zone_temp",
+    "weather_file_city_index", 
+    "weather_file_city", 
+]
+# these are only useful for upgrade features or are not relevant for hp upgrades
+other_appliance_features = [
+    "heat_pump_sizing_methodology",
+    "has_heat_pump_dryer",
+    "has_induction_range",
+    "has_methane_gas_appliance",
+    "has_fuel_oil_appliance",
+    "has_propane_appliance",
+    # "cooking_range_fuel",
+    # "clothes_dryer_fuel",
+]
+# features we are not likely to be able to collect data on
+# altho we may be able to collect data on the features these depend on
+# so we want to drop these so those can show
+unknown_features = [
+    'window_ufactor',
+    'window_shgc',
+    'water_heater_recovery_efficiency_ef',
+    'duct_insulation_r_value',
+    'duct_leakage_percentage',
+    'infiltration_ach50',
+    'wall_material',
+    'insulation_wall_r_value',
+    'insulation_foundation_wall_r_value',
+    'insulation_slab_r_value',
+    'insulation_rim_joist_r_value',
+    'insulation_floor_r_value',
+    'insulation_roof_r_value',
+    'insulation_ceiling_r_value',
+    'lighting_efficiency', 
+    'plug_load_percentage',
+    'usage_level_appliances'
+]
+
+# metadata that we want to include that didn't get directly translated into features
+additional_metadata = [
+    "ashrae_iecc_climate_zone_2004",
+    "federal_poverty_level",
+    "geometry_building_type_acs",
+    "income",
+    "tenure",
+    "community",
+    "windows", 
+    "county"
+]
+
+# Prepare the main dataframe for analysis
+df_predict = (
+    features.join(outputs_savings.select("building_id", target), on="building_id")
+    .join(metadata.select("building_id", *additional_metadata), on="building_id")
+    .drop(*pkey_features, *cz_features, *other_appliance_features, *unknown_features)
+    .where(F.col("heating_appliance_type") != "ASHP")
+    .where(~F.col("is_mobile_home"))
+).toPandas()
+
+# Identify categorical and numeric features
+categorical_features = [k for k, v in df_predict.dtypes.items() if v == "object"]
+numeric_features = [k for k, v in df_predict.dtypes.items() if v != "object" and k != target]
+
+# COMMAND ----------
+
+# Perform analysis for each community
+for community_name, df_community in df_predict.groupby("community"):
+    fit_and_plot_shap_values(
+        df=df_community,
+        categorical_features=categorical_features,
+        numeric_features=numeric_features,
+        target=target,
+        n_feature_display=15,
+        title_detail=community_name
+    )
+
+# Perform analysis for a national sample
+fit_and_plot_shap_values(
+    df=df_predict.sample(frac=0.3),
+    categorical_features=categorical_features,
+    numeric_features=numeric_features,
+    target=target,
+    n_feature_display=15,
+    title_detail="National"
+)
+
+# COMMAND ----------
+
+