General factors of usability Sample Clauses

General factors of usability. Nielsen (2003) defines usability as follows: ‘…a quality attribute that assesses how easy user interfaces are to use’. He goes on to describe five quality components to define usability: learn-ability, efficiency, memorability, errors, and satisfaction. The learn-ability factor concerns how easy it is to learn to use the device. Efficiency determines the amount of resources to be invested in order to achieve the intended goal. The less the invested resource, e.g. time, the higher the efficiency. Efficiency also refers to the capability for matching functions provided by the product with the needs of the users to produce acceptable product performance without inducing frustration, fatigue, and dissatisfaction. The memorability component of usability indicates that the operation of a device should be easy to remember, thereby minimising the effort required to relearn how to use the device following periods of non-use. Errors are generally much more easily identifiable from products with computer interfaces, where error messages are signalled to the user. However, in a broader context errors can be construed as user actions that do not accomplish the desired goal. In any case, errors resulting from interacting with the product should be minimal, and if they do occur, the user should be able to easily recover from them. Finally, the satisfaction component addresses the experience the user has in interacting with the product, that is, the experience should be satisfying (Xxxx, 2004). The International Organisation of Standardisation sets out seven general ergonomic principles (DIN EN ISO 9241, part 10), which should be adopted in the design of any dialogue to make it more effective, efficient and satisfying to use.
AutoNDA by SimpleDocs

Related to General factors of usability

  • ADJUSTMENT FACTORS The Contractor will perform any or all Tasks in the Construction Task Catalog for the Unit Price appearing therein multiplied by the following Adjustment Factors. See the General Terms and Conditions for additional information.

  • Particular Methods of Procurement of Consultants’ Services 1. Quality- and Cost-based Selection. Except as otherwise provided in paragraph 2 below, consultants’ services shall be procured under contracts awarded on the basis of Quality and Cost-based Selection.

  • Annual Leave Loading During a period of annual leave an employee will receive a loading of 17.5 per cent calculated on the employee’s normal hourly rate of pay and the daily fares allowance if applicable. The loading will also apply to proportionate leave on lawful termination.

  • Staffing Levels To the extent legislative appropriations and PIN authorizations allow, safe staffing levels will be maintained in all institutions where employees have patient, client, inmate or student care responsibilities. In July of each year, the Secretary or Deputy Secretary of each agency will, upon request, meet with the Union, to hear the employees’ views regarding staffing levels. In August of each year, the Secretary or Deputy Secretary of Budget and Management will, upon request, meet with the Union to hear the employees’ views regarding the Governor’s budget request.

  • Measurements and arithmetic conventions All measurements and calculations shall be in the metric system and calculations done to 2 (two) decimal places, with the third digit of 5 (five) or above being rounded up and below 5 (five) being rounded down.

  • Other Methods of Procurement of Consultants’ Services The following table specifies the methods of procurement, other than Quality and Cost-based Selection, which may be used for consultants’ services. The Procurement Plan shall specify the circumstances under which such methods may be used. (a) Quality-based Selection (b) Selection under a Fixed Budget

  • Recommended language skills The sending institution, following agreement with the receiving institution, is responsible for providing support to its nominated candidates so that they can have the recommended language skills at the start of the study or teaching period:

  • Mileage Measurement Where required, the mileage measurement for LIS rate elements is determined in the same manner as the mileage measurement for V&H methodology as outlined in NECA Tariff No. 4.

  • SECONDARY FACTORS The extent of control which, by agreement, COUNTY may exercise over the details of the work is slight rather than substantial; (b) CONTRACTOR is engaged in a distinct occupation or business; (c) In the locality, the work to be done by CONTRACTOR is usually done by a specialist without supervision, rather than under the direction of an employer; (d) The skill required in the particular occupation is substantial rather than slight; (e) The CONTRACTOR rather than the COUNTY supplies the instrumentalities, tools and work place; The length of time for which CONTRACTOR is engaged is of limited duration rather than indefinite; (g) The method of payment of CONTRACTOR is by the job rather than by the time; (h) The work is part of a special or permissive activity, program, or project, rather than part of the regular business of COUNTY; (i) CONTRACTOR and COUNTY believe they are creating an independent contractor relationship rather than an employee relationship; and The COUNTY conducts public business. It is recognized that it is not necessary that all secondary factors support creation of an independent contractor relationship, but rather that overall there are significant secondary factors which indicate that CONTRACTOR is an independent contractor. By their signatures to this Agreement, each of the undersigned certifies that it is his or her considered judgment that the CONTRACTOR engaged under this Agreement is in fact an independent contractor.

  • NET INVESTMENT FACTOR The Net Investment Factor for any Subaccount as of the end of any Valuation Period is determined by dividing (1) by (2) and subtracting (3) from the result, where:

Draft better contracts in just 5 minutes Get the weekly Law Insider newsletter packed with expert videos, webinars, ebooks, and more!