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Customer Health Metrics and Scoring Questions

Designing, implementing, and operating customer health measurement systems that combine multiple signals into scores or segments to predict outcomes such as churn, retention, and expansion. Includes selecting and justifying leading indicators versus lagging indicators and choosing relevant data inputs such as product usage patterns, engagement frequency, feature adoption, support ticket volume, payment and billing signals, account changes, and customer sentiment including net promoter score. Covers approaches to constructing scores using rule based logic, weighted indices, statistical models, and machine learning models, as well as feature engineering, handling missing data, and robustness checks. Describes calibration of score ranges and thresholds into actionable risk or opportunity categories, validation techniques including backtesting and cohort analysis, evaluation metrics and performance monitoring, and methods for measuring business impact through lift analysis and controlled experiments. Also addresses operationalization and production considerations such as batch versus real time scoring, event driven pipelines, integration with customer relationship management systems and workflow automation, dashboards and alerts for operational teams, prioritization and playbook design for interventions, monitoring for data drift and model staleness, feedback loops for retraining and improvement, explainability for stakeholder trust, and governance for privacy and data compliance.

MediumTechnical
0 practiced
Design a backtesting and cohort analysis plan to validate a new customer health score. Specify data splitting (time windows), cohort definitions, key metrics to compute (e.g., churn-rate-by-score-decile over 90 days), and how you would check for data leakage and confounding variables.
MediumTechnical
0 practiced
Explain how to compute lift and plot a cumulative gain chart from model predictions for a holdout period. Include formulas for lift at decile and cumulative lift, what the baseline is, and how a CSM leader would interpret the 2x lift in the top decile.
MediumTechnical
0 practiced
Propose a monitoring and alerting plan for a customer health scoring model. List concrete data-level, model-level, and business-level metrics you would monitor (e.g., feature distribution z-scores, AUC, churn-rate-by-bucket), thresholds or detection rules for alerts, and suggested remediation actions per alert level.
EasyTechnical
0 practiced
A significant portion of customers have missing Net Promoter Score (NPS) values and many support tickets are unstructured text. As a data scientist building a health score, explain practical strategies to incorporate NPS and support sentiment signals when they are sparse and biased. Discuss imputation, separate indicators for missingness, and alternatives to include support data.
HardSystem Design
0 practiced
Design a feature store for customer health metrics that supports both batch features (daily aggregates) and online features (last activity timestamp, recent error count). Explain how you would handle feature freshness, versioning of features and transformations, access patterns for training vs serving, and the API contract for feature retrieval.

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