LOOMA – WOOD TRANSPORT PLANNING

To maintain high production levels, Fibria needs to handle wood raw materials efficiently. Therefore implement a system capable of optimizing timber transport planning, considering its unique features. Assessing the density of the wood mix needed by the production unit, the system carries out tactical and operational planning and yard movements, reducing the size of the fleet used and the number of log handling movements and wait time in the yard. The system has been deployed in Jacareí and Três Lagoas.

BACKGROUND

Timber supply is a problem at the start of the pulp supply chain. In short, wood supply is made up of the following steps: once each production unit’s cut time is set, we need to determine when the wood will be transported, use of fleet trucks, each load’s final destination and the equipment used in the plant, to provide the amount of wood needed to the factory with properties (density and MIX) within the specified ranges.

This complex decision process still depends on rain which is a complicating factor and makes it difficult for trucks to get to the farms and alters timber truck loading rates.

With the ultimate goal of supplying wood mix to the factory, and considering plant, maintenance, cut reform, exploration, transportation costs, as well as the distribution and moving around of cutting machines, quality and volume of timber available in each plot, road conditions throughout the year, among other elements that make up the problem on its different decision levels, it aims to minimize costs, maximize margins, maximize volumes or whatever weighted combination of these goals.

Thus, tactically planning the appropriate levels (annual), operations (monthly) and very short-term (daily) are very important as it impacts cost and process productivity.

SOLUTION

GAPSO has developed an advanced planning system to support the difficult task of planning and scheduling various components of raw material supply to pulp production plants.

LOOMA IS MADE UP OF THREE MODULES:

Modules

Tactical Planning Module (MPT): determines the optimal sequencing of projections and plots in each project to meet the required mix of wood, minimizing transport and movement costs, taking into account farm and fleet features, transportation costs, monthly rainfall, wood drying curves, capabilities and inventory policies for a one-year outlook and a monthly detail.

Module Operational Planning (MPO): sets out a schedule to minimize shipping costs and yard equipment handling costs for a 30 day outlook and daily detail. That is, volumes to be transported per production unit for chipping and stock (as well as volumes to be transshipped for chipping stock) and scheduling each fleet truck depending on factory demand (volume and density mix), farm features, beginning fleet features and situation, transportation costs, monthly rainfall, wood drying curves, yard equipment capacity, and policies and situation of beginning stock.

Yard Planning Module (MP2): determines truck destination at the yard, planning up to between 6 and 8 hours to minimize handling costs and queue times, given the consumption mix of the plant and considering equipment availability (crane, chipping tables, trucks for transshipping), inventory and mix location and the arrival of trucks.

 

Annual planning done by MPT i.e. fleet of trucks and volumes to be transported from each production unit in each month during the year are migrated into MPO. From this data input, the MPO generates a schedule which specifies the monthly trips to transport planned volumes by MPT for that month. Once trips are planned, the daily schedule is exported to MP2 which takes in the trucks and decides their destination within the wood yard.

BENEFITS

  • Assured fleet forecasting
  • Better supply mix estimate
  • Uniform supply
  • Cost reduction of moving trucks around the yard
  • Decreased idle time/bottleneck of truck fleet
  • Reducing annual transport costs
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