Showing papers on "Acceptance testing published in 1986"

Human Factors Testing and Evaluation

Abstract: 1 Introduction to Human Factors Test and Evaluation 2 Introduction to Mockup, Developmental and Operational Testing 3 Development of the Test Plan 4 Measurement Methods 5 Environmental Testing 6 Special Measurement Problems 7 The Testing Literature 8 The Status of Test and Evaluation Practice Index

Testing online and print user documentation

Abstract: User-testing of computer documentation is beginning to move into the laboratory. A properly conducted user test offers software producer much more information that cannot be obtained in any other manner. The author discusses the advantages and disadvantages of the previous ways of user testing such as testing in the marketplace, magazine reviews, and prerelease on-site testing (beta tests). In addition, a detailed case study of a laboratory-based usability test is presented.

Timber pole safety by design

Abstract: A breakaway design for the modification of timber utility poles that will radically increase the safety of passengers in impacting vehicles has been developed and comprehensively tested This design is called the Hawkins breakaway system (HBS) The system not only accomplishes the goal of increasing safety but exhibits characteristics of significant advantage to a utility company A statement of safety philosophy applicable to the evaluation of roadside structures has been prepared It can be used as the basis for the evaluation of any proposed safety improvement relative to roadside geometry and structures It was used here to develop compliance tests for breakaway utility poles and to evaluate the results of those tests Analysis of the literature relative to the cost-effectiveness of breakaway utility poles reveals that there will be a positive societal benefit associated with carefully selected applications

MFTF-B acceptance tests and operation

Abstract: Final acceptance tests of the Mirror Fusion Test Facility (MFTF-B) were completed in February 1986. These tests verified performance of the following subsystems: the magnet system, the vacuum system and vessel, cryogenic systems, 80-keV neutral-beam sources and power supplies, microwave power systems for plasma heating, the supervisory control and diagnostic system, and the local control and instrumentation system. The entire magnet system was operated at full field continuously for 24 hours. The largest field alignment error under full load, determined using an electron beam technique, was 6 mm, well within the required precision of 15 mm. Absolute values of the magnetic field were determined using nuclear magnetic resonance techniques and were found to be within 2% of predicted values. All magnetic protection systems and fault protection systems were tested at full load. At 4.35 K, the cooling capacity of the liquid helium system exceeded the 11 kW rating and the nitrogen reliquifier met its 500 kW rating.

Multiperspective analysis and testing of expert systems

Abstract: The paper describes a technique which the author developed for testing expert systems. The technique, which he calls multiperspective testing, can be applied during both the knowledge engineering phase and the acceptance testing phase of developing an exppert system. The first step in multiperspective testing is to define a group of performance measures ('perspectives') that focus on the behavior of the knowledge base. For each such measure, the results of testing are summarized in four scores, which the author calls 'expansion,' 'detection,' 'discrimination,' and 'comprehension.' These scores have the advantage of providing more specific information about how the knowledge base should be updated or corrected.

Measures of Test Effectiveness in a Communications Satellite Program

Abstract: A framework for establishing test-effectiveness criteria can be developed by analyzing the test experience of a satellite program. Such criteria can then be used to design an optimal test plan for future application. This paper reviews a typical acceptance test profile and uses a hypothetical example to illustrate a failure distribution scenario during acceptance testing. A method for improving test effectiveness is outlined.

Application of Sequential Sampling Plans for Test Program Set Acceptance.

Abstract: : A sequential test plan for accepting test program sets is proposed. This plan is similar in basic theory to that described in MIL-STD-2077 but provides certain parameter changes as well as an operational distinction which allows for classification of faults.

Characteristics and performance of the ESTEC large space simulator cryogenic system

Abstract: The final concept and performance characteristics of the Large Space Simulator (LSS) at ESTEC, The Netherlands are discussed. The LSS cryogenics system has proven its operational capabilities under simulated heat load conditions and provides sufficient margin for future elevated requirements. The acceptance test proved that nominal operating pressures can be lower than the design parameters, providing increased system safety and reliability. The ease of access for repair and the incorporated redundancy will limit system downtime. Finally, the system design resulted in a low consumption of LN sub 2, which is an important factor in keeping the operational costs at a low level.

Benchmark and acceptance tests: why and when to use them

Abstract: Acceptance and benchmark tests will provide important assurances that an automation system will meet defined performance requirements. Three acceptance tests should be required by a library and performed by the vendor: 1) a system reliability acceptance test, 2) one or more functional performance acceptance test, and 3) a full load response time acceptance test. Additionally, a library may require that benchmark tests be conducted after a vendor has been selected, but before a computer is installed in the library, if the vendor does not have installed systems comparable to the library's requirements, or if other similar systems have not previously met the library's performance objectives.

Threaded Connection Qualification Procedures Utilized for an Ultra-Deep, High-Pressure Gas Well

Abstract: This paper describes the premium connection qualification program used to qualify three different connections for the production tubular strings used in an ultra-deep, high pressure gas well. A total of eight connection types were tested during the program. Four connections failed to meet the program's acceptance criteria. Full-scale test procedures and the data acquisition system used to collect, store, reduce, and plot strain gauge data while testing are discussed.

Automatic Wafer Stepper Calibration And Testing

Abstract: Wafer stepper calibration and testing may be facilitated by using the auto wafer aligner feature of the wafer stepper as a metrology tool. This paper describes the procedures utilized in the calibration and acceptance testing of wafer steppers. The method of collecting data is explained, as well as the algorithms used to calculate calibration factors. Data from actual system tests is presented.

Preliminary assessment of the performance of concrete as a structural material for alternative low-level radioactive waste disposal technologies

Abstract: The objective of this study was to develop information needed to evaluate the long-term performance of concrete and reinforced concrete as a structural material for alternative LLW disposal methods. The capability to carry out such an evaluation is required for licensing a site which employs one of these alternative methods. The basis for achieving the study objective was the review and analysis of the literature on concrete and its properties, particularly its durability. In carrying out this program, criteria for evaluating performance of concrete and factors that can effect its performance were identified. The factors are both intrinsic, i.e., associated with composition of the concrete (and thus controllable), and extrinsic, i.e., due to external environmental forces such as climatic conditions and aggressive chemicals in the soil. A section of the report is devoted to the properties of coatings and their possible use in protecting concrete from chemical attack and enhancing its useful properties. The testing of concrete, using both accelerated tests and long-term non-accelerated tests, is discussed with special reference to its application to modeling of long-term performance prediction. On the basis of the study's results, minimum acceptance criteria are recommended as an aid in the licensing of disposal sitesmore » which make sure use of alternative methods.« less

Testing Methods for Power Cable Insulation

Abstract: Testing methods for power cable insulation depend basically on type and material of cable insulation. Cross-linked Polyethylene (XLPE) is now spreading widely for power cable insulation at the rated voltage of 66 to 154 kV world-wide, and especially in Japan many 275 kV lines have already been put in service. Typical conventional power cable insulation is oil-impregnated paper which is used mainly for oil-filled cable above 66 kV in many countries, including Japan. Testing methods for both of these types of power cables in Japan are introduced here in comparison with those prevailing in the USA together with the reason for each testing method or condition. In general, there is no fundamental difference between testing methods in Japan and in the USA. However, test voltages are decided by the insulation thickness and the specified stress in the USA, while test voltages in Japan are given directly by the rated voltage. Tests described here cover factory tests to be made at the time of delivery, acceptance tests after installation at site, and maintenance tests to be made during operation.

Hydraulic Machines Model Acceptance Tests

Abstract: The article begins with a description of the modern test installations, giving the dimensions of the models most frequently used and the head heights. Attention is then given to the most modern measuring apparatus for calculating static and dynamic flow, head and torque. The accuracy for these various instruments is demonstrated by practical examples. The various classic tests on reduced models are described. These are: performance (power, output), cavitation, runaway speed, unsteady behavior and strain measurement on the main parts of the machine. Lastly, the article deals with similitude problems and scale effects for predicting the performance of the full-size machine, showing that the accuracy obtained is generally higher than that of measurements made on the prototype.