Organizational stability is average effective global activity rate in an evolving E-type system

Q.  What is the average effective global activity rate in an evolving E-type system is invariant over the lifetime of the product?
- Published on 22 Jul 15

a. Self-regulation
b. Reducing quality
c. Feedback systems
d. Organizational stability

ANSWER: Organizational stability
 

    Discussion

  • Nirja Shah   -Posted on 06 Oct 15
    - The following are the eight laws laid down by Lehman and Belady.

    - The are known as "Lehman's laws of software evolution".

    Continuing Change
    - It is an E-type system that must be continually adapted or it becomes progressively less satisfactory.

    Increasing Complexity
    - It is as an E-type system evolves, its complexity increases unless work is done to maintain or reduce it.

    Self Regulation
    - It is an E-type system evolution processes which are self-regulating with the distribution of product and process measures close to normal.

    Conservation of Organizational Stability (invariant work rate)
    - The average effective global activity rate in an evolving E-type system is invariant over the product's lifetime.

    Conservation of Familiarity
    - As an E-type system evolves, all associated with it, developers, sales personnel and users, for example, must maintain mastery of its content and behaviour to achieve satisfactory evolution.
    - Excessive growth diminishes that mastery. Hence the average incremental growth remains invariant as the system evolves.

    Continuing Growth
    - The functional content of an E-type system must be continually increased to maintain user satisfaction over its lifetime.

    Declining Quality
    - The quality of an E-type system will appear to be declining unless it is rigorously maintained and adapted to operational environment changes.

    Feedback System
    - It is an E-type evolution process which constitute multi-level, multi-loop, multi-agent feedback systems and must be treated as such to achieve significant improvement over any reasonable base.

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