Ökat flöde genom timmersorteringen vid Ala sågverk

Detta är en Uppsats för yrkesexamina på avancerad nivå från Luleå/LTU Skellefteå

Sammanfattning: Ala sawmill in Ljusne, Hälsingland, has increased its flow through the
sawing plant during the last couple of years. The problem now is the
sorting plant, as this part of the mill is now slower than the rest. A
close analysis of the sorting plant was therefore necessary to be able to
increase the flow through. The aim of the project was to find solutions
that can lessen downtime and increase flow. The goal was to increase the
flow from 650 to 925 logs through the sorting plant per hour. To achieve
this several sub-goals were defined:

• Flowchart of the timber yard
• Short stops – causes and solutions
• Production stops – causes and solutions
• Other changes that simplify/enhance handling of timber and work

To understand the flow in the sorting plant a thorough investigation was
made of the flow and the parts influencing the flow. The different
assignments of the workers were considered and reasons for stops along the
line were investigated. Interviews with all concerned parties were
performed to find underlying causes of found symptoms.
The project has identified changes along the line, work methods, and
handling of timber that will lead to fewer stops and increased efficiency
in the use of the trucks and other resources.
The timber sorting at Ala is a special case in that the line is managed by
three different organisations: VirkesMätarFöreningen (timber measuring),
Kalmar Industries (trucks and truckers), and Stora Enso (owners and upkeep).
During the work it became apparent that an underlying cause for many
problems was differences between these groups. The project has made
suggestions that will lessen these problems and by so doing increase both
work methods and flow through. Also a way to better share information and
knowledge among the different groups and individuals has been found. The
flow was improved but the goal of 925 logs sorted per hour was not reached.