Feasibility

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					Genomförbarhet aka .
Feasibility – the measure of how beneficial or
practical an information system will be to an
organization.
Feasibility analysis – the process by which feasibility
is measured.

Operational feasibility – a measure of how well a solution will
work or be accepted in an organization.
         Preformance. Does the system provide adequate throughput and response time?
         Information. Does the system provide end-users and managers with timely, accurate usefully formatted information
         Economy. Does the system offer an adequate service to reduce cost and increase profits
         Control. Adequate protection and accuracy of information
         Efficiency. Maximum use of resources, and minimum delays
         Services. Desirable and reliable service and flexible and expandable
Technical feasibility – a measure of the practicality of a
technical solution and the availability of technical resources
and expertise.
Schedule feasibility – a measure of how reasonable the
project timetable is.
Economic feasibility - a measure of the cost-effectiveness of
a project or solution.

Kravanalys
Kravanalys syftar till att översätta verksamhetsbehov till systemkrav.

Innehåll
          Funktionella krav: Funktionalitet, användbarhet, supportbarhet
          Icke-funktionella krav: designbegränsningar, implementationskrav, Interfacekrav, fysiska krav
          Prioritering av krav
Kravanalys - processen
• Syfte med processen är att:
• studera användarnas behov av ett system
• ta fram en modell av användarnas krav
• beskriva modellen i kravdokumentet
• Denna process sker interaktivt (mellan olika grupper av användare/intressenter
och design-teamet) .En 6-steg process
• 1. Samla
• 2. Klassificera
• 3. Lös motsägelser
• 4. Prioritera
• 5. Validera
• 6. Förstå tillämpning

Nonfunctional Requirements
       10. Look and Feel Requirements
       11. Usability and Humanity Requirements
       12. Performance Requirements
       13. Operational and Environmental Requirements
       14. Maintainability and Support Requirements
       15. Security Requirements
       16. Cultural and Political Requirements
       17. Legal Requirements

Functional Requirements:
Functional requirements may be calculations, technical details, data manipulation and processing and other specific functionality that define what a
system is supposed to accomplish.

           6. The Scope of the Work
           7. Business Data Model
           8. The Scope of the Product
           9. Functional Requirements

Requirements Types
- For ease of use, we have found it convenient to think of requirements as belonging to a type.
- Functional requirements are the fundamental or essential subject matter of the product. They
describe what the product has to do or what processing actions it is to take.
- Nonfunctional requirements are the properties that the functions must have, such as performance
and usability. Do not be deterred by the unfortunate type name (we use it because it is the most
common way of referring to these types of requirements). These requirements are as important as the
functional requirements for the product's success.
- Project constraints are restrictions on the product due to the budget or the time available to build
the product.
- Design constraints impose restrictions on how the product must be designed. For example, it might
have to be implemented in the hand-held device being given to major customers, or it might have to
use the existing servers and desktop computers, or any other hardware, software, or business
practice.
- Project drivers are the business-related forces. For example, the purpose of the project is a project
driver, as are all of the stakeholders-each for different reasons.
- Project issues define the conditions under which the project will be done. Our reason for including
them as part of the requirements is to present a coherent picture of all factors that contribute to the
success or failure of the project and to illustrate how managers can use requirements as input when
managing a project.

				
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posted:8/23/2012
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