Lehman MM and Stenning V, FEAST/1: Case for Support, ICSTM, March 1996  Home/Search   Document Not in Database   Summary   Related Articles   Check

....to a changing operational environment VIII 1996 Feedback System E type programming processes constitute multilevel, multi loop, feedback systems and must be treated as such to achieve significant improvement over any reasonable base Table 1. Laws of Software Evolution A recent review [leh96b] extends the earlier [leh78,80] discussion. The present paper is oriented to software process improvement and, therefore, addresses the laws only to the extent relevant in that context. The eighth law, in particular, is central to its principal thesis since it states the fact that the E type ....

....hypothetical instances of feedback based on their understanding of typical industrial processes. Examples based on real experience in actual processes proved more illusive. The study of industrial projects is, clearly, of high priority in any systematic investigation. A proposal was prepared [leh96b] and the two year FEAST 1 project is now funded by EPSRC under grants numbers GR K86008 and GR L07437. It will commence in the Autumn of 1996 with Professors B Rustem, V Stenning and the present author as Principle Investigators. The industrial collaborators are BAe, ICL, Logica and MOD. These ....

Lehman MM and Stenning V, FEAST/1: Case for Support, ICSTM, March 1996

.... forward path changes III Major process improvement requires attention to feedback mechanisms and process dynamics 4 The FEAST 1 Project The hypothesis was initially explored by a core group 2 and discussed more widely in a series of workshops [leh96a, fea84 5] The FEAST 1 research project [leh96b] has been seeking tangible supporting evidence from data on active industrial evolution processes. Black box (metric) analysis is being undertaken and white box (system dynamics) models are being developed and analysed. Findings have been widely reported [fwp98] 5 Laws of Software Evolution ....

Lehman MM and Stenning V, FEAST/1: Case for Support, ICSTM, March 1996

....outlined above and process insight developed more recently. It has been widely presented and discussed. As a result its precise formulation has changed somewhat since first proposed [fea94] Versions of the hypothesis will be found in [fea94 5] and in [leh95] We present below a recent formulation [leh96b]. Hypothesis . As complex feedback systems E type software processes evolve strong system dynamics and the global stability tendency of other feedback systems Supporting observation . Processes adopted, applied and improved in industry, will naturally evolve positive feedback to drive ....

.... taken in seeking to explain the third law [leh78,80a] and was shown to be the case in, at least, one instance [cho81] A brief synopsis of the core group discussions and conclusions may be found in [leh96a] 6 Preliminary Results Systematic work on the project according to the current plan [leh96b] must await its formal start in the Autumn of this year. But some small progress has already been made. In particular, Logica plc, has given us growth data on one of their system. This banking transaction system with some one hundred user sites has now seen over twenty documented releases and sub ....

Lehman MM and Stenning V, FEAST/1: Case for Support, ICSTM, March 1996

....multi agent feedback systems and must, in general, be treated as such to achieve major process improvement. Table 1 Laws of Software Evolution The present paper is intended to present a significant sample of the evidence supporting the above viewpoint as obtained from the FEAST 1 project [leh96b] to date. The extent to which that evidence supports the laws is reviewed in detail elsewhere [leh96c,98b] In short, the results to date are not inconsistent with any of the laws. They provide additional support for six of the eight. 27 5 98, 3:43 pm 2 mml594p[papers] 3 Numbered in order of ....

Lehman MM and Stenning V, FEAST/1: Case for Support, ICSTM, March 1996

.... 1 mml573[Research Paper] 1 To conserve space all papers included in [leh85] are referenced by their chapter number in that book 2 Professors MM Lehman, V Stenning (Imperial College) and WM Turski (Warsaw U, and Dr DE Perry (Bell Labs Lucent) FEAST 1 research project, initiated in 1996 [leh96b] has been seeking tangible supporting evidence from data on active industrial evolution processes. Black box (metric) analysis is being undertaken and white box (system dynamics) models are being developed and analysed. Findings have been reported [leh96,97,98a,b,wer98] 4 Laws of Software ....

Lehman MM and Stenning V, FEAST/1: Case for Support, ICSTM, March 1996

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