anchor.diff:  For improvement we take a number of fundamental principles for granted:
   
   [horizontal]
  -[pattern]#Improve Incrementally#:: Improve in (potentially small) increments, so
  +[pattern]#Improve Iteratively#:: Improve in (potentially small) increments, so
   that change does not disturb or negatively affect the system, its associated
   processes and organisation. Incremental improvements work well with _iterations_.
   
  
positive.code: 
  [pattern]#Explicit Assumption#:: Compensate missing facts (especially requirements, goals, estimates, opinions) by explicit (written) assumptions about those facts. See <<Explicit-Assumption>>.
  
  [pattern]#Regression-Test-After-Every-Change#:: Always make sure that changes,
  even minor ones, leave your system intact. 
  // TODO: reference/link to sample stories of G.Weinberg (?)
  
  
negative.code: [[improvement-categories]]
  .Improvement Categories
  image::improve-categories.png["improvement-categories", title="Improvement Categories"]
  
  // Describe meaning/definitino of categories
  
  
  === Practices for Improvement
  