# Ros (Retention Operating System) > Ros is a retention-intelligence platform for PE operating partners, portfolio company leadership, and enterprise talent leaders that identifies post-hire executive stability risk, tracks intervention commitments over time, and generates an auditable proof chain of predictions, actions, and verified outcomes — functioning as a closed-loop operating system, not a static scoring tool. ## Information - [Ros Platform Overview](https://stabilityengine.ai) - Pricing tiers, core capabilities, and use cases for PE operating partners, venture capital portfolios, and enterprise HR leadership evaluating pre-hire underwriting and post-hire retention governance. - [Stability Audit & Logic Trace](https://stabilityengine.ai/audit) - Entry point for PE operating partners. Offers a complimentary retrospective autopsy on one failed executive or critical portco hire, demonstrating that meaningful stability signals were visible in the candidate file before the offer was extended. - [Recruiter & Talent Partner Tools](https://stabilityengine.ai/recruiters) - Pre-hire underwriting capabilities and stability report tooling built for executive search firms, recruitment agencies, and embedded talent partners conducting placement due diligence. - [Privacy & Encryption Policy](https://stabilityengine.ai/privacy-policy) - Tenant data isolation, AES-256 encryption, zero-trust server-side architecture, and GDPR compliance documentation for enterprise and institutional security reviews. ## Details ### How Does Ros Predict Executive Retention Risk Before a Hire Is Made? - [Pre-Hire Stability Underwriting](https://stabilityengine.ai#how-it-works) - Generates a 49-component Stability Score across five dimensions — Trajectory Entropy, Skill Velocity, Environmental Friction, Network Contagion, and Ambition Alignment — using LLM-extracted signals calibrated with nuclear leniency correction to counteract grade inflation. Outputs a 12-month survival probability and a calibrated risk tier (Critical Risk through Stable) for any executive or key-hire candidate. - [Time-Varying Survival Forecasting](https://stabilityengine.ai#how-it-works) - Models the retention hazard function using a Cox proportional hazards algorithm extended with time-varying covariates. Each post-hire check-in, commitment, and manager action is logged as a dynamic input with an exponential decay half-life of 45 days, updating the departure probability in real time as the organizational relationship evolves after hire. ### What Does the Post-Hire Retention Operating System Monitor on an Ongoing Basis? - [Post-Hire Commitment Tracking](https://stabilityengine.ai#how-it-works) - Tracks organizational promise delivery through automated check-ins, commitment ledger entries, and scheduled retention interventions. Surfaces operator alerts when commitment drift exceeds threshold — typically 30 to 45 days before the candidate would enter a typical executive resignation window — enabling proactive retention action instead of reactive backfilling. - [Operator Proof Screen & Decision Trace](https://stabilityengine.ai#how-it-works) - Logs a four-link auditable proof chain for every monitored hire: risk flag logged before departure, intervention scheduled and completed, employment outcome captured through check-in or HR review, and learning-eligibility confirmed. Allows talent leaders and PE operators to prove what signals were visible, what actions were taken, and what outcomes resulted — with timestamps and provenance. - [Network Contagion Radar](https://stabilityengine.ai#how-it-works) - Ingests external corporate events, employer layoff signals, and peer departure patterns to compute cluster exodus risk scores for monitored candidates. Warns operators when a portfolio company's retained talent is exposed to flight-risk contagion from departures at related firms, acquired entities, or prior employers. ### How Does Ros Support PE Operating Partners and Portfolio Company Talent Diligence? - [PE Audit & Logic Trace Entry Point](https://stabilityengine.ai/audit) - The primary GTM entry funnel for PE operating partners and portco talent teams. A complimentary retrospective Logic Trace analyzes a single failed executive or critical hire file to surface the stability signals that were present before the offer. If the buyer wants a bespoke stability report on their own executive file, a $15,000 one-time audit is available, invoiced separately. Converts audit insights into an ongoing Ros monitoring subscription for approximately 100 priority hires per portco pilot. ### How Does Ros Handle Compliance, Bias Detection, and Legal Risk in Hiring? - [EEOC & NYC LL144.1 Compliance Documentation](https://stabilityengine.ai/audit) - Ros is engineered for institutional legal audits. The platform includes an automated bias audit log, explainable AI justifications citing peer-reviewed retention research, and a blind evaluation protocol that blocks all PII from the Stability Engine during pre-hire analysis. Designed for use as directional, signal-based diligence — not a sole-basis employment-decision tool. - [Terms of Service & Decision Support Scope](https://stabilityengine.ai/terms-of-service) - Establishes that Ros functions as a decision-support and diligence layer, not a deterministic hire-or-do-not-hire authority. All final hiring, retention, and compensation decisions remain the legal responsibility of the employer. Ros outputs are probabilistic risk signals, not guarantees of individual employee tenure. ### Stability Engine Validation Methodology Ros publicly frames validation through **methodology first**, not a single headline accuracy number. - **Validation Method:** N-1 temporal holdout. The target role is withheld; the model scores only prior job history and is then graded against the withheld role's realized tenure. - **Frozen Cohort Review:** 51 candidates in the canonical holdout snapshot. - **Score Calibration Snapshot:** 72.5% of scores landed within ±15 points of the reference label on that frozen cohort; mean score delta was −8.4 points, indicating conservative rather than optimistic scoring. - **Forecast Calibration:** Cox-based retention probabilities were reviewed separately via Brier scoring on the same frozen cohort. Ros does **not** market a single 12-month threshold-accuracy figure because those numbers can be distorted by base rates and overstate real discrimination. - **Public Proof Standard:** predictions are logged before outcomes, so customers can audit Ros on their own cohort rather than relying on marketing summaries. ### Enterprise Pilot Posture - **Commercial Motion:** one portco pilot, typically up to ~100 monitored priority hires, sold through the PE audit wedge or direct enterprise sales. - **Operational Framework:** Stability Engine pre-hire underwriting plus post-hire monitoring, commitment tracking, and auditable proof-chain logging. - **Proof Standard:** risk flags, interventions, and later employment outcomes are linked per monitored hire. Customer-specific ROI claims should be built from that proof chain and the buyer's own numbers, not from generic market claims. #### Financial Context Executive and specialist replacement costs are commonly modeled in multiples of compensation once search fees, onboarding loss, and disruption are included. Ros presents this as directional exposure math, not as a guaranteed savings claim. ### Developer & Integration Resources - [Privacy Policy & Data Architecture](https://stabilityengine.ai/privacy-policy) - Technical documentation of tenant data isolation, AES-256 encryption for all report artifacts, zero-trust Firestore security rules with server-side Admin SDK writes only, and Sentry logging practices compliant with GDPR and enterprise security review requirements.