Tree Ordinances and Admin Orders

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• Supplier assessments typically require the supplier (in this case a certified /registered arborist) to submit some evidence of the quality of their past work over a given period of time, proof of certifications, etc. • Manufacturing and service industries often require suppliers to be certified /registered to ISO9000 /ISO14000 (an international standards organization). These registrations are administered by third party auditors such as UL or RAB who have been empowered by ISO. Compliance with standards is assured by the presence of a documented quality system that is monitored by the auditor. Costs for registration is borne by the supplier (arborist or developer). • Noncompliance is typically associated with some penalty. In private industry this would equate to a contract violation and significant penalties and /or loss of privilege as someone who could self - inspect would be likely results. • Some limited level of inspection should be required. The level of inspection would be based on a statistically valid sampling plan (Quality Control Handbook, Juran). For example a plan where 5% are inspected and for which statistical inference can be made about overall compliance. Inspection could be segmented based on arborist, developer, contractor, neighborhood, etc. Without any inspection there would be no knowledge of the level of compliance or noncompliance. • Another key to the success of a self - inspection or limited inspection program is to make the standards /requirements as unambiguous as possible. Ambiguity could, and would likely, lead to frequent inadvertent noncompliance or conflict and inconsistency about who is in compliance and who is not in compliance. I hope that this information is useful for you. I would be happy to discuss the quality control implications of the proposed code changes and professional quality possibilities in more detail.