A review after 5 years

Cease dependence on inspection to achieve quality... by building it into the product in the first instance

BMLC task group on PPGS convened in November 1993 Investigate the need for and the feasibility of a new type of QMS A system proposed: –Formal management of performance warranties –Acceptance criteria based on performance (rather than compliance with requirements) –One that supports innovation and formal quality management systems

Discussed at BMLC in May 1994 CAPSA ’94 Agreed that the development of PPGS and its implementation should proceed A framework document was published in November 1994 – basis for further development

Concerns for road user New protocol for risk sharing Opportunities for innovation

Performance specification Performance based specification Performance related specification Ascending order

Full systemProduct Spec Level of performance guarantees Cost of supervision

Quality framework -general outline Quality system -organisational regulations and procedures Quality plan -specific quality practices, resources...

7 national roads projects 2 provincial roads projects 7 mainly remedial measures to black- top pavements 2 Sealing and repairs on pcc pavements

Contractors cannot be expected to warrant a product for reasons outside of their control Clients cannot be prescriptive and expect a warranty based on these prescriptions

Performance warranties improve quality Improved performance = improved quality at reduced cost The “desired result” is customer oriented Improved performance involves client consultant and contractor

Product certification yields higher confidence levels than process certification Realistic warranty periods - 5 years Increase in tender prices offset by savings in engineering

Are performance models competent to determine acceptable risk profiles? Is there enough scope for contractor decisions Are inputs (e.g. traffic) sufficiently well defined (and controlled)?