P&C Actuarial Reserving Software: A Buyer’s Guide to a Controlled Reserve Close

Many teams already have capable spreadsheets, databases, and reporting tools. The failure point is the space between them: source extracts are copied, triangles are rebuilt, assumptions move through email, selection rationale is separated from the model, and final reports are assembled from several versions. Evaluate whether the software connects these steps without obscuring professional judgment.

Use a representative valuation in the evaluation. Start with raw claims, premium, and exposure data; reconcile it; create paid and incurred development views; run several appropriate methods; test assumptions; record selections; obtain review; explain the movement from the prior close; and produce every required workpaper and report from the approved valuation.

The software should preserve the exact source files or extracts, mapping logic, transformations, exceptions, reconciliation totals, and approvals used for each valuation. A reviewer must be able to follow a reported number back through the selected reserve, method output, triangle cell, and underlying source data without reconstructing the close from someone’s desktop.

Test late claims, duplicate records, reopened claims, currency conversion, changing segmentation, prior-period corrections, missing premium, and mismatched accounting totals. Confirm which users can correct data, which changes require a new approved dataset, and whether every rerun preserves the earlier result.

ASOP 43 asks actuaries to consider methods or models appropriate to the purpose, claims, development, data, and assumptions, and to consider multiple methods unless reliance on one is reasonable. Software should make those comparisons easier while keeping the actuary responsible for method choice, assumptions, and the final selection.

Compare paid and incurred Chain Ladder, Bornhuetter-Ferguson, Cape Cod, expected-loss, frequency-severity, and other methods relevant to your portfolios. Inspect development diagnostics, tail selections, large-loss treatment, expected loss ratios, sensitivity, and the ability to explain why a method was included, excluded, or weighted differently.

A scenario should branch from an approved baseline without overwriting it. The software should display the impact of changed factors, tails, priors, weights, or segmentation, then allow an actuary to carry an accepted scenario into a documented selection. Review comments, responses, changes, approvals, and timestamps belong with that valuation.

Movement analysis should bridge the prior approved close to the current one. Separate payments, new claims experience, method or assumption change, portfolio mix, currency, and management adjustment where material. This makes the result usable for management, finance, auditors, and the next actuarial review instead of presenting only a new point estimate.

Confirm the lines, entities, currencies, valuation bases, gross and net treatment, reinsurance capabilities, deterministic or stochastic scope, custom methods, security model, and report definitions included in the proposed release. A clear boundary is better than a broad demo claim that cannot survive implementation.

Assess how the product connects to policy, claims, finance, data-platform, spreadsheet, and reporting workflows. Price data preparation, migration, configuration, model validation, user acceptance, parallel close, training, governance, and ongoing change. Define success with close time, reconciliation exceptions, manual transfers, review cycle time, reproducibility, and report consistency—not only model runtime.