Maximise timber recovery

Transcription

1 Page 1 of 6 Maximise timber recovery Level 5 Credits 25 Purpose People credited with this unit standard are able to: manage safety when maximising timber recovery; compare log supply with log specification; complete a sawing study, conversion, volume and value calculations, a sawing variation study; and a study on the effect of feed speed on sawing accuracy; and analyse sawmill operations for bottle-necks. Subfield Domain Status Solid Wood Manufacturing Sawmilling Registered Status date 18 December 2006 Date version published 18 December 2006 Planned review date 31 December 2011 Entry information Accreditation Standard setting body (SSB) Recommended: Unit 8007, Implement a saw centre size control programme; or demonstrate equivalent knowledge and skills. Evaluation of documentation and visit by NZQA and industry. Competenz Accreditation and Moderation Action Plan (AMAP) reference 0173 This AMAP can be accessed at Special notes 1 Definition Worksite documentation refers to instructions to staff on policy and procedures (including the application of legislation to worksite situations), which are formally documented, and are available for reference at the worksite. Examples are standard operating procedures, specifications, manuals, and manufacturer s information.

2 Page 2 of 6 2 The following apply to the performance of all elements of this unit standard: a All work practices must meet recognised codes of practice and documented worksite health and safety and environmental procedures (where these exceed the code) for personal, product and worksite health and safety, and must meet the obligations required under current legislation, including the Health and Safety in Employment Act 1992, the Resource Management Act 1991, and their subsequent amendments. b All work practices must meet documented worksite operating procedures. This includes the recording (by electronic or non-electronic means) of activities, events, and decisions. c All evidence of communications gathered in relation to this unit standard must be in accordance with worksite procedures for content, recipient, timing and method. 3 All performance criteria must be demonstrated and assessed in accordance with the reference text: Maximise Timber Recovery (Auckland: Competenz, 2003) and available from Competenz, PO Box 9005, Newmarket, Auckland Elements and performance criteria Element 1 Manage safety when working in log yard and sawmill operations to maximise timber recovery. 1.1 Hazards associated with working in log yard and sawmill operations to maximise timber recovery are identified and actions to be taken to isolate, minimise or eliminate the hazard are described in accordance with worksite documentation. hazards may include but are not limited to moving equipment, dust, mobile plant, noise. 1.2 Safe work practices used in log yard and sawmill operations to maximise timber recovery are identified and used in accordance with worksite documentation and legislative requirements. practices may include but are not limited to isolation procedures, lock-outs, emergency stops, machine guarding, wearing appropriate safety equipment.

3 Page 3 of 6 Element 2 Compare log supply with log specification. evidence required of a minimum of three truck loads of logs with a mix of log grades. 2.1 Documentation for sample loads is checked for grade and weight data. 2.2 Loads are measured and tallied in accordance with the 2.3 Logs are graded using company log specifications, grades are compared with delivery documentation, and discrepancies are reported. 2.4 Under-bark volumes are calculated using the Smalian formula, and weight-tovolume conversions are calculated for each load. 2.5 Volume and weight data are analysed and reported on uniquely identified documents. 2.6 Recommendations for improvement in the log supply area are prepared from the comparison. Element 3 Complete a sawing study. evidence of a minimum of 15 logs is required in three separate batches. 3.1 Sample logs and plant are prepared, and operating staff are briefed for the study in accordance with the 3.2 Logs are monitored through the sawmill operation. 3.3 Green volumes recovered are measured and recorded in accordance with the 3.4 Grade values, conversion rates, and product yields are calculated and deviations from standards are reported. 3.5 Processing costs and revenues are calculated from specific mill processing costs and sales data. 3.6 Recommendations for improvement in the sawing area are made from the results of the study.

4 Page 4 of 6 Element 4 Complete conversion, volume, and value calculations. 4.1 Log volume calculations are evaluated and a preferred method is identified and justified. two methods. 4.2 Volume and value calculations are completed from given data. 4.3 Log value calculations are completed from given product mix data. Element 5 Complete a sawing variation study. evidence required of a minimum of three machine centres. 5.1 Sample input materials and plant are prepared, and operating staff are briefed for the study in accordance with the 5.2 Sawing operations are monitored and conditions recorded in accordance with the 5.3 Output materials are measured and results recorded in accordance with the 5.4 Data is analysed for within-board and between-board variation and potential causes are identified. 5.5 Recommendations for improvements in sawing variation are made from the results of the study. Element 6 Complete a study on the effect of feed speed on sawing accuracy. evidence is required of three speed settings. 6.1 Sample input materials and plant are prepared and operating staff are briefed for the study in accordance with the 6.2 Sawing operations are monitored and conditions recorded in accordance with the

5 Page 5 of Output materials are measured and results recorded for each speed setting, in accordance with the 6.4 Data is analysed for within-board and between-board variation and variations are reported. 6.5 Gullet loadings for the trial saw centre are calculated in accordance with the 6.6 Recommendations are made on saw speed from the results of the study. Element 7 Analyse sawmill operations for bottle-necks. 7.1 Cutting schedule for a given sawmill operation is determined in accordance with the 7.2 Activities per log are identified and recorded in accordance with the reference text. 7.3 Activities are analysed to determine bottle-necks in accordance with the 7.4 Sawmill operations are sketched with flows, process, merge and sort centres identified. 7.5 Recommendations are made on improvements to process flow from the study. Please note Providers must be accredited by the Qualifications Authority, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be accredited by the Qualifications Authority before they can register credits from assessment against unit standards. Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.

6 Page 6 of 6 Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements. Comments on this unit standard Please contact the Competenz at info@competenz.org.nz if you wish to suggest changes to the content of this unit standard.