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1 edition of An analysis of production and costs in high-lead yarding found in the catalog.

An analysis of production and costs in high-lead yarding

Magnus E. Tennas

An analysis of production and costs in high-lead yarding

by Magnus E. Tennas

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Published by U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Rane Experiment Station in Portland, Or .
Written in English


Edition Notes

Includes bibliographical references (p. 37).

Statementby Magnus E. Tennas, Robert H. Ruth and Carl M. Berntsen
SeriesResearch paper -- no. 11, Research paper (Pacific Northwest Forest and Range Experiment Station (Portland, Or.)) -- no. 11.
ContributionsRuth, Robert H., Berntsen, Carl M.
The Physical Object
Pagination37 p. :
Number of Pages37
ID Numbers
Open LibraryOL25594831M
OCLC/WorldCa67644290

The results indicated that the mean extraction productivity of small-shovel operations ranged between to m3 per scheduled machine hour (including all delays). At the forest level, the estimated average stump-to-forest road log production costs were US $ to /m3. High-lead yarding Fig. 2.—Study area num-ber 1 for comparing ef-Skyline yarding fects of skyline and high-lead yarding on ground Landing conditions. Direction of yarding o Control point 0 Milacre plot regeneration. Ground conditions not mapped included light slash, duff, and litter. The average slope of each plot was recorded on the map forms.

improvements in yarding production rates. The report includes a procedure for estimating direct yarding costs from time-study data gathered on a sampling basis. Direct yarding cost is often the largest single item on an appraisal or logging cost analysis, and usually the most difficult to estimate. Sufficient detail is included. Logging Cost and Production Estimation. Class notes. The yarding cycle. Required reading. Peters, P., , New approach to production and cost estimation. Developing factors for mechanical reliability; Hand-falling and skyline yarding - TN; Summary of harvesting systems performance - TR

Meaning and Definition. Cost of production refers to the total sum of money needed for the production of a particular quantity of output. As defined by Gulhrie and Wallace, “In Economics, cost of production features a special meaning. It is all about the payments or expenditures essential to get the factors of production of land, labor, capital and management needed to produce a commodity.   Jackson and Morris () studied the production and cost of a helicopter on yarding baldcypress in South Carolina. They found that average cycle time was minutes and the production rate was 2, [3] ( [3]) per hour with the hourly cost of $1, under excellent weather and timber conditions.


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An analysis of production and costs in high-lead yarding by Magnus E. Tennas Download PDF EPUB FB2

AN ANALYSIS OF PRODUCTION AND COSTS IN HIGH-LEAD YARDING s BY 1/. Magnus E. Tennas, Robert H. Ruth, and Carl M. ~erntsen- INTRODUCTION In recent years loggers and timber owners have needed better information for estimating logging costs in the Douglas -fir region.

Brandstromls comprehensive study, published in (I), 4/ has long been used as a guide in making cost by: 2. The need for up-to-date information on production and costs has led to a growing interest in the application of industrial engineering techniques in studies of logging operations.

Citation: Tennas, Magnus E.; Ruth, Robert H.; Berntsen, Carl M. An analysis of production and costs in high-lead by: 2. The highest cost activity was the yarding phase which cwon/m^3 (% of the total cost), followed by the costs of processing treelength materials into marketable log lengths (12,won.

study was to compare conventional high-lead yarding production rates in the two stands. PROCEDURE Two adjacent high-lead settings were laid out, with one in the standing green timber area and the other in the blowdown area (figs.

1 and 2). Volumes logged, machine-hours, and man-hours were recorded separately for each area. An analysis of production and costs in high-lead yarding. USDA, FS, Pacific Northwest Forest and Range Experiment Station Research Paper No. 11, 37 p. Estimation of Turn Location Parameters for.

The original time study was a continuous time study of a high-lead yarding operation carried out in at the Kelsey Bay Division of MacMillan Bloedel. The main objective was to study the influence of yarding distance, involving two settings with long yarding roads, on yarding production and costs.

Second it searches for the combination of roads and An analysis of production and costs in high-lead yarding book that minimizes total construction plus yarding costs. The tactical model uses information from the strategic model to determine the sequence of yarding during a day to maximize yarding productivity.

Dykstra, D. Production rates and costs for yarding by cable, balloon, and. (a) cost per unit time for each input factor (i.e., cost per unit time worked or utilized); (b) the production (output) for each phase of work per unit time.

In order to arrive at a final cost figure for the operations (the cost of delivered wood), this information is processed as shown in Figure 1. Total logging cost– the sum of road and yarding/skidding costs per MBF.

Tower – A steel mast or framework, generally protable, used instead of a spar tree for cable yarding. a) Standing tower – A vertical, telescoping steel tower, usually cylindrical in cross-section, which is portable and transported fromlanding to landing for cable yarding.

The production of cable yarding equipment is mostly with micro (27%) and small (53%) enterprises (Fig. Only a fifth of the manufacturers belonged to the medium enterprise category.

However, the number of employees working for a manufacturer does not necessarily reflect their output of cable yarding equipment, as most manufacturers have a. The application of these concepts to the economic analysis of cable settings will be demonstrated using examples taken from the literature.

HIGH-LEAD VERSUS SHOTGUN YARDING Many of the high-lead yarder/towers commonly encountered in the PNW can be rigged as something other than a high-lead cable configuration.

How it Works. By the s the basic technology of high-lead yarding had been worked out and refined. The operation centered on the use of one or more donkey engines running a series of cables, called “lines” or “wires” by the loggers who worked with them, rigged through blocks attached to a basic set-up, as illustrated in the Young Iron Works catalog, is shown in Figure.

Get this from a library. Cost and production analysis of the bitterroot miniyarder on an Appalachian hardwood site. [John E Baumgras; Penn A Peters; Northeastern Forest Experiment Station (Radnor, Pa.)] -- S2An horsepower skyline yarder was studied on a steep slope clearcut, yarding small hardwood trees uphill for fuelwood.

Yarding cycle characteristics sampled include: total cycle time. TP: Short-run Pdi Ft i tProduction Function TP increases rapidly up to level of labor input L 1 then increases at a slower rate as labor input increasesslower rate as labor input increases TP curve becomes flatter and flatter until it reaches maximum outputuntil it reaches maximum output.

An empirical time study was conducted to compare productivity and cost (stump to truck), effects on the residual trees and on the soil of four yarding methods - a forwarder following an in-woods processor, and a farm tractor, bulldozer, and rubber- tired cable skidder following manual felling - in a group selection harvest of a mixed hardwood stand in Maine.

A sensitivity analysis was applied. Estimating the least cost combination of cable yarding and tractor skidding for a timber sale area. USDA For. Serv. Res. Note RM Rocky Mt. For. and Range Exp. Stn., Fort Collins, Colo. Dykstra, D. Production rates and costs for yarding by cable, balloon, and helicopter compared for clearcuttings and partial cuttings.

Oreg. Brandstrom, A. Analysis of logging costs and operating methods in the Dauglas-fir region. The calculation of average yarding distance to a centralized landing, given a polygonal mesh approximation of the setting surface. Cost control in the logging industry. McGraw-Hill Book, New York.

Production rates and costs for yarding by cable, balloon and heli­ copter compared for clearcuttings and partial cuttings. Research bulletin Oregon State University, Corvallis, Oregon.

44 pp. DYKSTRA, DENNIS P, Some observations on roundwood metrication, Forest products journal. Vol. 28 no. 2: EHMKE, K. as operating costs, productivity, and safety considerations.

An Analysis of Production and Costs in High-Lead Yarding, by M.E. Tennas, R.H. Ruth, and C.M. Berntsen (3) Factors influencing production and costs on a high-lead yarding operation in a year-old stand on the Cascade Head Experi-mental Forest were isolated and analyzed.

Manufacturing costs are the costs incurred during the production of a product. These costs include the costs of direct material, direct labor, and manufacturing costs are typically presented in the income statement as separate line items.

An entity incurs these costs during the production process. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk.

Software. An illustration of two photographs. Images. An illustration of a heart shape Donate. An illustration of text ellipses. More. An icon used to represent a menu that can be toggled by interacting.

Doing so improves efficiencies, lowers production costs, expedites the supply chain process, cuts lead times, and ensures that the value stream flows to the customer.

Although you may have heard the term, lean, used before, read on to learn about the origins of lean, the main principles of lean manufacturing, and its benefits.

The cost of a fuel treatment operation is the sum total of a long list of component costs. These are broadly separated into fixed and variable costs (Riggs, ).In engineering cost analysis, there is an implicit boundary that determines the extent of costs considered ().For example, in determining just an operation cost for skidding, the fixed and variable costs of interest may be limited .