8006 version 3
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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
Solid Wood Manufacturing
Domain
Sawmilling
Status
Registered
Status date
18 December 2006
Date version published
18 December 2006
Planned review date
31 December 2011
Entry information
Recommended: Unit 8007, Implement a saw centre size
control programme; or demonstrate equivalent
knowledge and skills.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Competenz
Accreditation and Moderation Action Plan (AMAP) reference
0173
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
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.
 New Zealand Qualifications Authority 2016
8006 version 3
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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 1149.
Elements and performance criteria
Element 1
Manage safety when working in log yard and sawmill operations to maximise timber
recovery.
Performance criteria
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.
Range
1.2
hazards may include but are not limited to – moving equipment,
dust, mobile plant, noise.
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.
Range
practices may include but are not limited to – isolation procedures,
lock-outs, emergency stops, machine guarding, wearing
appropriate safety equipment.
 New Zealand Qualifications Authority 2016
8006 version 3
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Element 2
Compare log supply with log specification.
Range
evidence required of a minimum of three truck loads of logs with a mix of log
grades.
Performance criteria
2.1
Documentation for sample loads is checked for grade and weight data.
2.2
Loads are measured and tallied in accordance with the reference text.
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.
Range
evidence of a minimum of 15 logs is required in three separate batches.
Performance criteria
3.1
Sample logs and plant are prepared, and operating staff are briefed for the study
in accordance with the reference text.
3.2
Logs are monitored through the sawmill operation.
3.3
Green volumes recovered are measured and recorded in accordance with the
reference text.
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.
 New Zealand Qualifications Authority 2016
8006 version 3
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Element 4
Complete conversion, volume, and value calculations.
Performance criteria
4.1
Log volume calculations are evaluated and a preferred method is identified and
justified.
Range
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.
Range
evidence required of a minimum of three machine centres.
Performance criteria
5.1
Sample input materials and plant are prepared, and operating staff are briefed
for the study in accordance with the reference text.
5.2
Sawing operations are monitored and conditions recorded in accordance with
the reference text.
5.3
Output materials are measured and results recorded in accordance with the
reference text.
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.
Range
evidence is required of three speed settings.
Performance criteria
6.1
Sample input materials and plant are prepared and operating staff are briefed
for the study in accordance with the reference text.
6.2
Sawing operations are monitored and conditions recorded in accordance with
the reference text.
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8006 version 3
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6.3
Output materials are measured and results recorded for each speed setting, in
accordance with the reference text.
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
reference text.
6.6
Recommendations are made on saw speed from the results of the study.
Element 7
Analyse sawmill operations for bottle-necks.
Performance criteria
7.1
Cutting schedule for a given sawmill operation is determined in accordance with
the reference text.
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
reference text.
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.
 New Zealand Qualifications Authority 2016
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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.
 New Zealand Qualifications Authority 2016