# Gather Insights

> Gather is AI-powered site diary and NEC4/JCT commercial record management software for UK construction contractors, quantity surveyors, and commercial managers. It automatically reviews site diary entries against the contract to flag missed compensation events, time-barred claims, and disallowed cost before they cost money. Used by Tier 1 contractors on major UK infrastructure programmes.

## Product

- [QS AI Agent](https://www.gatherinsights.com/en/qs-ai-agent): The core product — an AI agent that reads site diaries and flags missed NEC4 compensation events, early warnings, and time-barred claims automatically.
- [Book a Demo](https://www.gatherinsights.com/en/book-a-demo): Book a live walkthrough of Gather with the team.
- [Product Report](https://www.gatherinsights.com/en/report): Overview of Gather's site diary, commercial record, and AI review capabilities.
- [Customer Stories](https://www.gatherinsights.com/en/customer-stories): Case studies from UK contractors using Gather on live infrastructure projects.

## NEC4 Contract Management

- [NEC4 Hub](https://www.gatherinsights.com/en/nec4): Overview of NEC4 contract management — compensation events, early warnings, and commercial risk under NEC4 ECC.
- [Eight-Week Time Bar](https://www.gatherinsights.com/en/nec4/eight-week-time-bar): Explains the NEC4 clause 61.3 eight-week notification deadline for compensation events and what happens if it's missed.
- [Early Warnings](https://www.gatherinsights.com/en/nec4/early-warnings): What an NEC4 early warning is, when it's required, and how it differs from a compensation event notice.
- [Compensation Events](https://www.gatherinsights.com/en/nec4/compensation-events): Full definition and walkthrough of NEC4 compensation events — causes, notification, and quotation process.
- [Dividing Date](https://www.gatherinsights.com/en/nec4/dividing-date): Defines the NEC4 dividing date used to split actual and forecast cost in a compensation event assessment.
- [Disallowed Cost](https://www.gatherinsights.com/en/nec4/disallowed-cost): What counts as disallowed cost under NEC4 Option C/D and how it affects payment.
- [Programme Management](https://www.gatherinsights.com/en/nec4/programme-management): How NEC4 treats the accepted programme and its role in compensation event assessment.
- [Payment](https://www.gatherinsights.com/en/nec4/payment): NEC4 payment mechanics — assessment dates, certification, and interim valuations.
- [Records and Compliance](https://www.gatherinsights.com/en/nec4/records-and-compliance): Why contemporaneous records matter for NEC4 compliance and claims defensibility.
- [Contract Health Check](https://www.gatherinsights.com/en/nec4/contract-health-check): A diagnostic framework for assessing NEC4 contract administration health on a live project.
- [Weather Delays](https://www.gatherinsights.com/en/nec4/weather-delays): How NEC4 treats weather as a compensation event, including the 1-in-10 test.
- [Common Mistakes](https://www.gatherinsights.com/en/nec4/common-mistakes): The most frequent NEC4 administration errors that cost contractors compensation events.
- [Response Periods](https://www.gatherinsights.com/en/nec4/response-periods): NEC4's default response periods and the consequences of missing them.
- [Concurrent Delay](https://www.gatherinsights.com/en/nec4/concurrent-delay): How NEC4 handles concurrent delay when assessing compensation events and extensions of time.
- [Subcontractor Management](https://www.gatherinsights.com/en/nec4/subcontractor-management): Managing subcontractor compensation events and back-to-back NEC4 obligations.
- [ECC Options Explained](https://www.gatherinsights.com/en/nec4/ecc-options-explained): Comparison of NEC4 ECC main options (A-F) and their commercial implications.
- [Roles and Responsibilities](https://www.gatherinsights.com/en/nec4/roles-and-responsibilities): NEC4 roles — Project Manager, Supervisor, Contractor — and their contractual duties.
- [Dispute Prevention](https://www.gatherinsights.com/en/nec4/dispute-prevention): How proactive NEC4 administration prevents disputes escalating to adjudication.
- [Mobilisation Checklist](https://www.gatherinsights.com/en/nec4/mobilisation-checklist): A checklist for setting up NEC4 contract administration at project start.
- [Activity Schedule Amendments](https://www.gatherinsights.com/en/nec4/activity-schedule-amendments): How activity schedule changes are managed and priced under NEC4.

## Earned Value Management

- [Earned Value Definitions Index](https://www.gatherinsights.com/en/earned-value/definitions): Full glossary of earned value management (EVM) terms for construction commercial teams.
- [CPI & SPI](https://www.gatherinsights.com/en/earned-value/cpi-spi): Definitions and worked examples of Cost Performance Index and Schedule Performance Index.
- [Cost & Schedule Variance](https://www.gatherinsights.com/en/earned-value/cost-schedule-variance): How to calculate and interpret cost variance (CV) and schedule variance (SV).
- [EAC, ETC & TCPI](https://www.gatherinsights.com/en/earned-value/eac-etc-tcpi): Definitions of Estimate at Completion, Estimate to Complete, and To-Complete Performance Index.
- [Construction EVM Example](https://www.gatherinsights.com/en/earned-value/construction-example): A worked earned value example using a real construction project scenario.
- [S-Curve Tracking](https://www.gatherinsights.com/en/earned-value/s-curve-tracking): How S-curves are used to track planned vs actual value and progress over time.
- [Common EVM Mistakes](https://www.gatherinsights.com/en/earned-value/common-mistakes): The most frequent earned value management errors on construction projects.
- [EVM Implementation Guide](https://www.gatherinsights.com/en/earned-value/implementation-guide): Step-by-step guide to setting up earned value management on a project.
- [Planned Value](https://www.gatherinsights.com/en/earned-value/definitions/planned-value): Definition of Planned Value (PV) in earned value management.
- [Actual Cost](https://www.gatherinsights.com/en/earned-value/definitions/actual-cost): Definition of Actual Cost (AC) in earned value management.
- [Cost Performance Index](https://www.gatherinsights.com/en/earned-value/definitions/cost-performance-index): Definition and formula for CPI (Cost Performance Index).
- [Schedule Performance Index (Time)](https://www.gatherinsights.com/en/earned-value/definitions/schedule-performance-index-time): Definition of the time-based Schedule Performance Index.
- [Budget at Completion](https://www.gatherinsights.com/en/earned-value/definitions/budget-at-completion): Definition of Budget at Completion (BAC).
- [Estimate at Completion](https://www.gatherinsights.com/en/earned-value/definitions/estimate-at-completion): Definition and calculation methods for Estimate at Completion (EAC).
- [Cost Variance](https://www.gatherinsights.com/en/earned-value/definitions/cost-variance): Definition and formula for Cost Variance (CV).
- [Schedule Variance](https://www.gatherinsights.com/en/earned-value/definitions/schedule-variance): Definition and formula for Schedule Variance (SV).
- [Work Breakdown Structure](https://www.gatherinsights.com/en/earned-value/definitions/work-breakdown-structure): Definition of a Work Breakdown Structure (WBS) and its role in EVM.
- [Performance Measurement Baseline](https://www.gatherinsights.com/en/earned-value/definitions/performance-measurement-baseline): Definition of the Performance Measurement Baseline (PMB).
- [Earned Schedule](https://www.gatherinsights.com/en/earned-value/definitions/earned-schedule): Definition of Earned Schedule, an extension to traditional EVM for schedule forecasting.
- [Management Reserve](https://www.gatherinsights.com/en/earned-value/definitions/management-reserve): Definition of Management Reserve and how it differs from contingency.

## Site Diary

- [Site Diary Hub](https://www.gatherinsights.com/en/site-diary): Overview of what a construction site diary is and why it matters commercially.
- [How to Write a Site Diary](https://www.gatherinsights.com/en/site-diary/how-to-write): Step-by-step guidance on writing a compliant, contract-ready site diary entry.
- [What to Include](https://www.gatherinsights.com/en/site-diary/what-to-include): The essential fields every site diary entry needs to hold up under scrutiny.
- [Site Diary Template](https://www.gatherinsights.com/en/site-diary/template): A downloadable site diary template structured around NEC4 record-keeping needs.
- [Site Diary Examples](https://www.gatherinsights.com/en/site-diary/examples): Real examples of well-written vs weak site diary entries.
- [Site Diary vs Allocation Sheet](https://www.gatherinsights.com/en/site-diary/site-diary-vs-allocation-sheet): The difference between a site diary and a daily allocation sheet, and when you need both.
- [Site Diary and NEC4 Compensation Events](https://www.gatherinsights.com/en/site-diary/nec4-compensation-events): How site diary entries feed directly into NEC4 compensation event notices and quotations.
- [Daily Site Report](https://www.gatherinsights.com/en/site-diary/daily-site-report): Definition and structure of a daily site report vs a site diary.
- [Construction Daily Log](https://www.gatherinsights.com/en/site-diary/construction-daily-log): What a construction daily log should capture and why it's a commercial record, not just admin.
- [Foreman Report](https://www.gatherinsights.com/en/site-diary/foreman-report): How foreman-level daily reporting feeds the wider commercial record chain.

## AI in Construction

- [AI Construction Hub](https://www.gatherinsights.com/en/ai-construction): Overview of how AI is used in construction commercial management, by persona.
- [For Quantity Surveyors](https://www.gatherinsights.com/en/ai-construction/quantity-surveyors): How AI tools help QSs catch missed compensation events and disallowed cost.
- [For Commercial Managers](https://www.gatherinsights.com/en/ai-construction/commercial-managers): How AI supports commercial managers running NEC4/JCT contract administration at scale.
- [For Project Managers](https://www.gatherinsights.com/en/ai-construction/project-managers): How AI-flagged site records support project manager decision-making and risk visibility.
- [For Project Directors](https://www.gatherinsights.com/en/ai-construction/project-directors): Portfolio-level view of how AI commercial record review reduces claim and dispute risk.

## Data & Definitions

- [Construction Dispute Statistics UK](https://www.gatherinsights.com/en/construction-dispute-statistics-uk): Original-research page synthesising UK construction dispute data and trends.
- [Contemporaneous Records](https://www.gatherinsights.com/en/contemporaneous-records): Definition of contemporaneous records and why they're decisive in NEC4/JCT claims and adjudication.

## Free Templates

- [Template Library](https://www.gatherinsights.com/en/resources): Free, ungated Excel templates for construction commercial teams — site diaries, earned value, NEC4 tracking, and progress reporting.
- [Construction Progress Report Template](https://www.gatherinsights.com/en/site-diary/progress-report-template): Free Excel template for weekly/monthly construction progress reporting.
- [EVM Calculator Template](https://www.gatherinsights.com/en/earned-value/evm-template): Free Excel template for calculating CPI, SPI, and other earned value metrics.
- [Labour & Plant Allocation Tracker Template](https://www.gatherinsights.com/en/site-diary/allocation-tracker-template): Free Excel template for tracking daily labour and plant allocation on site.
- [Delay / Compensation Event Log Template](https://www.gatherinsights.com/en/nec4/compensation-event-log-template): Free Excel template for logging NEC4 compensation events and delay events.
- [Cost-to-Complete Forecast Template](https://www.gatherinsights.com/en/earned-value/cost-to-complete-template): Free Excel template for forecasting cost-to-complete and estimate at completion.
- [Daily Diary to Weekly Report Workbook](https://www.gatherinsights.com/en/site-diary/weekly-report-workbook): Free Excel workbook that rolls up daily site diary entries into a weekly report.
- [Variation / Change Order Tracker Template](https://www.gatherinsights.com/en/nec4/variation-tracker-template): Free Excel template for tracking variations and change orders under NEC4.
- [Lookahead Planner Template](https://www.gatherinsights.com/en/free-templates-and-tools/templates-lookahead-planner): Free Excel template for 2/4/6-week lookahead programme planning.
- [RFI / TQ Register Template](https://www.gatherinsights.com/en/free-templates-and-tools/templates-rfi-tq-register): Free Excel template for tracking requests for information and technical queries.
- [Subcontractor Performance Scorecard Template](https://www.gatherinsights.com/en/free-templates-and-tools/templates-subcontractor-scorecard): Free Excel template for scoring subcontractor performance on site.