Project Overview

TAG Advisory was appointed to the Public Transport Authority of Western Australia’s (PTA) Quantity Surveying and Cost Estimating Services Panel in August 2025, securing a position on this prestigious panel arrangement for an initial two-year term with extension options totalling a further three years. This significant appointment recognises TAG Advisory's established expertise and reinforces the continuous, collaborative relationship that has developed between TAG Advisory and PTA across numerous successful infrastructure projects. The panel arrangement enables PTA to engage TAG Advisory's specialist services seamlessly across multiple concurrent projects, ensuring consistent, high-quality cost advisory support for Western Australia's critical transport infrastructure programme.

Strategic Significance

The panel appointment represents a cornerstone achievement in TAG Advisory's ongoing partnership with PTA, formalising a trusted advisory relationship that spans the full spectrum of quantity surveying and cost estimating services. This arrangement acknowledges TAG Advisory's proven capability to provide independent, specialist advice across PTA's diverse project portfolio, from concept through to delivery. The panel structure enables rapid deployment of expertise when needed, ensuring PTA has immediate access to trusted cost advisory services without procurement delays.

TAG Advisory's appointment, alongside select other firms, demonstrates PTA's confidence in our technical capabilities, commercial acumen and ability to deliver consistent, reliable advice across varying project types and complexities. This ongoing relationship positions TAG Advisory as an integral partner in PTA's infrastructure delivery strategy, supporting the organisation's ambitious programme of rail, bus and associated transport infrastructure development.

Scope of Services

Under the panel arrangement, TAG Advisory provides comprehensive Quantity Surveying and Cost Estimating services across three core service streams. Estimation services encompass developing, reviewing and certifying various estimate types including first principles, unit rate-based and probabilistic estimates. The team develops pricing schedules for tender documents, calculates liquidated damages, updates estimates based on design evolution and provides expert advice during tender assessments and negotiations. Risk and opportunity identification, costing and assessment form critical components of this service stream.

Commercial services span the full contract lifecycle, providing cost advice during tender assessments, evaluating contractor programmes, assessing claims and variations and conducting site visits for progress claim verification. TAG Advisory's expertise extends across multiple delivery models including Alliance contracts, Early Contractor Involvement, Design and Construct and traditional delivery methods.

Related services include developing and conducting training programmes, participating in value engineering workshops, leading risk management sessions utilising Monte Carlo analysis, and providing strategic advice as required by PTA project managers. This breadth of services ensures PTA has comprehensive support across all aspects of project cost management.

Continuous Partnership Model

The panel arrangement facilitates a continuous working relationship where TAG Advisory maintains ongoing familiarity with PTA's standards, processes and project portfolio. This continuity enables immediate mobilisation when services are required, with TAG Advisory's team maintaining current understanding of PTA's evolving infrastructure programme. The model supports knowledge retention across projects, ensuring lessons learnt and insights gained which will benefit subsequent engagements.

Regular performance reviews and collaborative workshops strengthen the partnership, ensuring service delivery continuously evolves to meet PTA's changing needs. This structured engagement model has established TAG Advisory as more than a service provider, becoming a trusted advisor whose deep understanding of PTA's objectives enhances project outcomes across the portfolio.

Value and Recognition

TAG Advisory's panel appointment reflects the high regard in which PTA holds our independent specialist advice. The selection process recognised our demonstrated capability to provide objective, robust cost advice that withstands scrutiny whilst supporting informed decision-making. Our ability to manage multiple concurrent engagements whilst maintaining consistent quality and reliability has proven essential to PTA's project delivery success.

The trusted advisor status achieved through this panel appointment enables TAG Advisory to provide strategic input beyond individual project requirements, contributing to programme-level improvements and methodology development that benefit PTA's entire capital programme.

Conclusion

The Quantity Surveying and Cost Estimating Services Panel appointment represents the strength of TAG Advisory's relationship with PTA built on trust, expertise and proven delivery.

This ongoing arrangement ensures PTA has immediate access to independent, specialist cost advisory services from a trusted partner who understands their objectives, standards and aspirations. Through this continuous collaboration, TAG Advisory remains committed to supporting PTA's infrastructure delivery programme with excellence, integrity and innovation, reinforcing our position as a cornerstone advisor in Western Australia's transport infrastructure development.