Previous Next V-Model Official Homepage by IABG  
Header  
SD 2.3: Investigation of Feasibility  

  SD2.3 - Realisierbarkeit untersuchen

Contents  
  • Product Flow
  • Handling
  • Roles
  • Methods
  •  
  • Tools Requirements
  • External Norms
  • Pre-Tailoring forms
  • Product Flow

    From Product to Methods Tool Req. Ext. Norms
    Activity State Chapter Title Activity State
    External - All Product Information - -     /ISO IEC 12207/

    Devlp. Proc.:
    Sys. Arch. Design

    PM5 accepted Existing Cost/Benefit Analysis - -    
    SD1 accepted Existing User Requirements - -    
    SD2.1 being proc. Existing System Architecture - -    
    - - 3.2 System Architecture.
    Feasibility Studies
    SD2.1
    PM5
    being proc. BA
    SIMU
    SSD18
    SSD19

    + "Chapter" are extra columns from the original printed version of GD 250

    Handling

    * Investigating the Use of Off-the-Shelf Products

    It is the primary task of the feasibility study to evaluate the availability of suitable off-the-shelf products under the aspect of a preferred use of off-the-shelf-product. To do so the market is investigated with regard to the suitability of off-the-shelf products, based on the User Requirements. The aim is to identify products that might cover parts of the System. The adequacy of effort spent on the market analysis must be justified with regard to its economic aspects. The results of the market analysis have to be used as a basis for the definition of the System Architecture.

    * Definition of Evaluation Criteria

    Evaluation criteria for the solution proposals must be defined as the basis for the feasibility study. The criteria must be prioritized and weighted. The criteria must consider aspects like interface complexity, usability of off-the-shelf products, adequacy of technical concepts and of development standards.

    * Evaluation of Feasibility

    The solution proposals of the technical System Architecture have to be investigated to ascertain if they meet the user-level requirements (fields); after that they must be evaluated on the basis of the defined criteria.

    The technical design decisions have to be checked and analyzed to establish critical (sub-) products to be realized. Requirements for personnel, training, organization, logistics, infrastructure, and environmental protection must be taken into consideration.

    The effects of the possible solutions on the user organization have to be evaluated on the basis of the Cost/Benefit Analysis. This mainly refers to the practical realization and profitability (available or planned posts, availability of suitable personnel resources, personnel development concepts, agreement between solution proposals and personnel legislation/wage agreements, etc.).

    * Realization of Special Considerations about the IT Security

    When investigating feasibility, the following has to be observed with regard to IT security:

    ---------- The following part is an extension of the original printed version of GD 250 -----------

    Roles

    Role Participation
    Project Leader cooperating
    System Analyst cooperating
    System Designer responsible
    IT Representative cooperating
    IT Security Representative cooperating

    Methods

    Product Methods Allocation Use
    Chapter 3.2
    System Architecture.
    Feasibility Studies
    BA - Benefit Analysis (1) Generate
    SIMU - Simulation Models (2) Generate

    Notes:

    (1) Method BA is to be applied if
    - a complex decision has to be made and if
    - that decision is not based on external factors (i.e. factors beyond the evaluation criteria)

    (2) Method SIMU is to be applied if reliability requirements are high nd the use conditions are so complex that static investigations with regard to feasibility and resource requirements are not sufficient.

    Tools Requirements

    Product Functional Tools Requirements
    Chapter 3.2
    System Architecture.
    Feasibility Studies
    SSD18 - Estimating Performances
    SSD19 - Simulating Timing Behavior

    External Norms

    Norm Process Chapter Obs.
    /ISO IEC 12207/ Development Process System Architectural Design (s. Part 3 - ISO 3.2.1)

    Pre-Tailoring forms

    Pre-tailoring Forms SD Products Implementing
    Conditions
    Small Administrative IT Projects   SD2.3 x System Architecture                                          
    Medium Administrative IT Projects   SD2.3 x System Architecture                                          
    Large Administrative IT Projects   SD2.3 x System Architecture                                 SD2.3 x Criticality Higher       SD2.3 x Higher Maintenance Requirements
    Small/Medium Technical-Scientific IT Projects   SD2.3 x System Architecture                                          
    Large Technical-Scientific IT Projects   SD2.3 x System Architecture                                 SD2.3 x Criticality Higher       SD2.3 x Higher Maintenance Requirements
    Selection, Procurement and Adjustment of Off-the-Shelf Products   SD2.3 x System Architecture                               SD2.3 x Basic Requirements          

    Matrix Entries:

    Always required
    Always required under given circunstances
    Not required
    Description of data or database only

    Previous Next GDPA Online Last Updated 01.Jan.2002 Updated by Webmaster Last Revised 01.Jan.2002 Revised by Webmaster