1、BRITISH STANDARD CONFIRMED AUGUST1992 BS5131-6.1: 1981 Methods of Test for Footwear and footwear materials Part6: Codes of practice Section6.1 Code of practice for the comparative evaluation by wear trial of materials, components or constructions UDC 685.31:620.1:006.86:620.162BS5131-6.1:1981 This B
2、ritish Standard, having been prepared under the directionof the Clothing Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 30 November1981 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference CLT/7 Draft for
3、 comment 80/35402 DC ISBN 0 580 12394 4 Foreword This code of practice has been prepared under the direction of the Clothing Standards Committee at the request of representatives of consumer bodies, retailers and the footwear industry with the object of regularizing procedures for those wear trials
4、of footwear designed to evaluate new making processes, materials and components, design and constructional features, styles, etc., by direct comparison with footwear of an established performance. Typically, such a wear trial is used to evaluate a new upper or soling material, to relate wear perform
5、ance and characteristics to laboratory testing results or to determine the effect of a change of component or other process variation. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.
6、Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments in
7、corporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of issue CommentsBS5131-6.1:1981 BSI 11-1999 i Contents Page Foreword Inside front cover 1 Scope 1 2 Reference 1 3 Definitions 1 4 Recommendations for the conduct of
8、 the trial 1 5 Expression of results 2 6 Reporting of results 2ii blankBS5131-6.1:1981 BSI 11-1999 1 1 Scope This code makes recommendations to assist manufacturers and distributors in carrying out the wear trial evaluation of new making processes, materials, components, constructional and design fe
9、atures, styles, etc., by comparing their performance in wear directly with similar footwear of known or established performance. This code defines the comparative trial of new versus established footwear, either concurrently within the same pair of footwear or consecutively between pairs under simil
10、ar conditions of use. Wear trials designed to identify major weaknesses in design or construction and fitness-for-purpose are covered in BS5131-6.2. 2 Reference This Section refers to the following standards publication: BS5131, Methods of test for footwear and footwear materials Section 6.2 Code of
11、 practice for the identification in footwear trials of major weaknesses in design or construction and the assessment of fitness-for-purpose. 3 Definitions For the purposes of this Section of BS5131, the following definitions apply. 3.1 footwear all types of boots, shoes, sandals, slippers, etc. 3.2
12、subjects the wearers of the footwear for the duration of the trial 3.3 new footwear footwear, made to be compared with the control footwear in the wear trial, which incorporates the new materials, processes, etc. 3.4 new material, process, etc. a material, process, etc.which has not previously been
13、used in the application by the individual conducting the trial. It is not necessarily novel to the trade as a whole 3.5 control footwear made up in an established manner with materials, etc.of a known performance 3.6 variation each individual change or difference from the control, incorporated in th
14、e new footwear 4 Recommendations for the conduct of the trial 4.1 In appropriate cases more than one variation may, or of necessity will, be incorporated in the new footwear, but care should be taken not to involve variations which could have an unwanted interactive effect. Each variation being inve
15、stigated in the new footwear should be worn directly against the control or at least against footwear incorporating another variation which has, in turn, been worn directly against the control. 4.2 The total pairage(new plus control) should depend on the commercial risks involved but should not be l
16、ess than four pairs per comparison, distributed to not less than two subjects. 4.3 Subjects should be selected who can be relied upon to wear and return the footwear as requested. 4.4 Subjects whose present footwear shows signs of an abnormal wear pattern should be rejected. 4.5 Subjects selected sh
17、ould be of the sex, approximate age and occupation appropriate to the intended use of the footwear. Footwear intended for special purposes or activities, e.g.football boots, should be worn only by subjects engaged in such activity during the trial period. 4.6 The footwear should be fitted to the sub
18、jects to a commercial standard. It is important to achieve a good standard of fit in order to ensure meaningful results from the trial. NOTEWhere appropriate, hosiery should be worn both at fitting and during the course of the trial. Where an effect such as colour transfer from the footwear is an im
19、portant consideration white hose should be worn. It is then necessary to examine and assess the staining of the hose after single wear periods using the scoring system of5.2. 4.7 Pairing of footwear should be done according toa), b) or c) below. a) Where the variation(s) being considered allow it, o
20、ne half of each pair should be the new and the other half the control and both should be worn simultaneously by each subject. In order to balance out variation in performance due to an overall left or right foot bias, in half the subjects the control should be on the left foot and in the other half
21、it should be on the right foot.BS5131-6.1:1981 2 BSI 11-1999 b) Where colour, style or other differences in the variation(s) do not allow the procedure in a), one pair of each of the new and the control should be worn consecutively for identical periods and in similar circumstances by each subject.
22、At any one time approximately equal numbers of control and new pairs should be in wear, so as to minimize the possible effect of changes, for example, in weather conditions, during the course of the trial. c) Where a better balancing out of left/right differences is required than is provided by a),
23、a combination of procedures a) and b) should be adopted, i.e.two pairs should be provided for each subject, one new and one control, and consecutive wearing carried out as described in b) but with each pair worn comprising one new shoe and one control as in a). NOTEThis procedure has the effect of b
24、alancing out variation in performance due to left or right foot bias in individual subjects. 4.8 The minimum duration of the trial will be dependent on the comparison being made but should be such that a measurable or observable amount of general wear or deterioration is achieved in the control foot
25、wear. NOTEIn many comparative evaluation wear trials, useful information can be obtained by examining the footwear at suitable intervals before the trial is terminated. It is often desirable to continue the trial to the normal life expectancy of the footwear. It is advantageous, but not essential fo
26、r the procedure in4.7 a), if the period of wear is recorded by the subject. 4.9 At least three-quarters of the trial footwear with each variation should be examined in deriving any results from the trial. For the subjective assessment procedure outlined in5.2 at least three assessors capable of maki
27、ng an independent judgement should be used. 4.10 It is permissible to replace components during the trial, as deemed necessary by the organizers, to allow other aspects of the footwear to be evaluated. Necessary replacements should be noted and should not affect the fit or the normal dynamic functio
28、n of the footwear. 5 Expression of results 5.1 Whenever possible, a measured, objective assessment of the performance of each variation against the control should be made on each pair and the results averaged to provide the conclusion. 5.2 In cases where the procedure in5.1 is not practicable a subj
29、ective assessment of each pair should be made on a five-point scale related to the control by one of the comments These assessments should be numerically averaged to produce an overall score for each variation under examination. 6 Reporting of results The report should include the following: a) the
30、objectives of the trial and full identification of the control footwear and the variation(s) examined; b) that the trial was carried out according to4.7 a), b) orc) of BS5131-6.1; c) the total number of pairs of footwear in the trial and the number for each variation; d) the approximate duration of
31、the trial; e) the results of the wear trial expressed in accordance with5.1 or5.2. 5 considerably better than the control 4 better than the control 3 equal to the control 2 worse than the control 1 considerably worse than the control.blankBS5131-6.1: 1981 BSI 389 Chiswick High Road London W4 4AL BSI
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