{"id":144,"date":"2017-08-21T12:02:21","date_gmt":"2017-08-21T11:02:21","guid":{"rendered":"http:\/\/www.smharter.com\/blog\/?p=144"},"modified":"2020-08-14T16:31:54","modified_gmt":"2020-08-14T15:31:54","slug":"the-7-fundamental-principles-of-software-requirements","status":"publish","type":"post","link":"https:\/\/www.smharter.ai\/blog\/2017\/08\/21\/the-7-fundamental-principles-of-software-requirements\/","title":{"rendered":"The 7 fundamental principles of Software Requirements"},"content":{"rendered":"
    \n
  1. From Wicked problems definition:<\/strong>
    \nA problem is not understood until after you have developed a solution.<\/em>

    <\/p>\n

    Reference: Horst Rittel and Melvin Webber, Jeff Conklin, 1967-2008. See http:\/\/en.wikipedia.org\/wiki\/Wicked_problems<\/a> and http:\/\/www.cognexus.org\/wpf\/wickedproblems.pdf<\/a><\/p><\/li>\n

  2. Humphrey law:<\/strong>
    \nFor a new software system, the requirements will not be completely known until after the users have used it.<\/em>

    <\/p>\n

    Reference: Watts S. Humphrey, A Discipline for Software Engineering, Addison-Wesley, 1995. See http:\/\/en.wikipedia.org\/wiki\/Watts_Humphrey<\/a><\/p><\/li>\n

  3. The Uncertainty Principle in Software Engineering:<\/strong>
    \nUncertainty is inherent and inevitable in software development processes and products.
    \nSometimes also referred as Ziv’s law: specifications will never be fully understood.<\/em>

    <\/p>\n

    Reference: H. Ziv and D.J. Richardson, May 1996. See http:\/\/www.ics.uci.edu\/~ziv\/papers\/icse97.ps<\/a><\/p><\/li>\n

  4. Wegner\u2019s lemma:<\/strong>
    \nIt is not possible to completely specify an interactive system.<\/em>

    <\/p>\n

    Reference: Peter Wegner, Why interaction is more powerful than algorithms, Comm. of the ACM, May 1997.
    \nSee     http:\/\/www.cs.brown.edu\/people\/pw\/papers\/ficacm.ps<\/a><\/p><\/li>\n

  5. From the Lehman’s laws of software evolution:<\/strong>
    \nSoftware embedded in the real world become part of it, changing it and evolving in concert.<\/em>

    <\/p>\n

    Reference: Meir M. Lehman and Laszlo Belady, 1974-1996. See E-type programs in Programs, Life Cycles, and Laws of Software Evolution<\/a>
    \nand see     http:\/\/en.wikipedia.org\/wiki\/Lehman’s_laws_of_software_evolution<\/a><\/p><\/li>\n

  6. The Cone of Uncertainty:<\/strong>
    \nThe actual effort or scope can be 4 times or 1\/4 of the first estimate.<\/em>

    <\/p>\n

    Reference: McConnell, 2006. See http:\/\/en.wikipedia.org\/wiki\/Cone_of_Uncertainty<\/a><\/p><\/li>\n

  7. Langdon\u2019s lemma:<\/strong>
    \nSoftware evolves more rapidly as it approaches chaotic regions.<\/em>

    <\/p>\n

    Reference: W. B. Langdon. See also http:\/\/www.cs.ucl.ac.uk\/staff\/W.Langdon\/<\/a><\/p><\/li>\n<\/ol>\n\n\n

    <\/div>\n\n\n\n
    \n\n\n\n
    \n
    \n
    \"\"<\/figure><\/div>\n<\/div>\n\n\n\n
    \n
    \n\t

    Boost your Agile to a whole new level of mastery.<\/h3>\n\t

    \n\t
    \n\tSee how we can help.\n\t
    \n\tYou, your team, your organisation.\n\t
    \n\t
    \n\t<\/p>\n\n\t

    \n\t\t\n\t\tVirtual Mentoring\n\t\t<\/a> \n\t\t\n\t\tVirtual Assessments\n\t\t<\/a>\n\t<\/div>\n<\/div>\n\n\n\n

    <\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    Given the complex nature of the problems we try to solve and the solutions we try to envision, there’s no surprise the devil is in the details. <\/p>\n

    Sometimes we have to be highly intelligent and well-informed just to be undecided about them.<\/p>\n

    These seven principles are seven chances to spot the complexity hidden in the details.<\/p>\n","protected":false},"author":2,"featured_media":238,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software-development"],"_links":{"self":[{"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/posts\/144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/comments?post=144"}],"version-history":[{"count":24,"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/posts\/144\/revisions"}],"predecessor-version":[{"id":2053,"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/posts\/144\/revisions\/2053"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/media\/238"}],"wp:attachment":[{"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/media?parent=144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/categories?post=144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.smharter.ai\/blog\/wp-json\/wp\/v2\/tags?post=144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}