Whiskey sushi and flow

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Come participate in a conversation that challenges you to think about everyday implicit flow parameters. Let's chat about my bar, and my frustration while waiting for a temaki on a Japanese restaurant.. These examples will help us understand and talk about flow parameters and queues.

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Whiskey sushi and flow

  1. 1. Paulo  Caroli                                                        Agile  Coach   pcaroli@thoughtworks.com Twitter: @paulocaroli   Whiskey,   Sushi  and   Flow
  2. 2. Agenda   •  Flow  numbers  at  my  bar   •  Queue  and  wait  5me  at  a  Japanese   restaurant   •  Q&A  
  3. 3. Flow  numbers  at  my  bar  
  4. 4. WIP   •  The  number  of  bo?les  in  the  bar.  Bo?les   that  have  been  opened,  but  are  not  yet   empty.  
  5. 5. Lead  5me   •  The  5me  between  the  bo?le  is  added  to   the  bar  and  the  bo?le  comes  out  of  the   bar  (empty).    
  6. 6. Cycle  5me   •  The  5me  between  two  successive  empty   bo?les  leaving  the  bar  
  7. 7. Throughput   •  The  rate  at  which  bo?les  are  passing  through   the  bar.    
  8. 8. Batch  size   •  The  size  of  the  bo?les.    
  9. 9. My  bar…  
  10. 10. I  was  really  interested  in   measuring  a  whiskey  bo?le   average  lead  5me  in  my  bar...  
  11. 11. “The  average  number  of  work   items  in  a  stable  system  is  equal   to  their  average  comple5on  rate,   mul5plied  by  their  average  5me   in  the  system.”       John  Li(le,  1961  
  12. 12. Doing   (Limit)   Done  To  Do   10   5   9   31   18   17   21   4   7   5   1   12   John   Suzy   Paul   Amy   WIP   Lead  Time  
  13. 13. WIP  =  Throughput  x  Lead  5me      
  14. 14. Please  help  me  out...  
  15. 15. 12  bo?les...  
  16. 16. an  average  of  6  bo?les  per  year…  
  17. 17. What  is  the  average  lead   5me  for  a  bo?le  of   whiskey?  
  18. 18. (a)  2  months   (b)  3  months   (c)  6  months   (d)  1  year   (e)  2  years     What  is  the  average  lead  5me  for   a  bo?le  of  whiskey?  
  19. 19. WIP  =  Throughput  x  Lead  5me            
  20. 20. WIP  =  Throughput  x  Lead  5me       12  b  =  6  b  /  year  x  Lead  5me          
  21. 21. WIP  =  Throughput  x  Lead  5me       12  b  =  6  b  /  year  x  Lead  5me       Lead  5me  =  2  years      
  22. 22. How  to  reduce  lead  5me?  
  23. 23. Queue  and  wait  5me  
  24. 24. very  hungry  
  25. 25. one  temaki  
  26. 26. more  than  30   minutes  
  27. 27. very  frustrated  
  28. 28. “The  total  wait  5me  for  a  given   item  is  the  sum  of  its  queue  5me   plus  its  working  5me.”       Paulo  Caroli,  2013  (at   AgileTrendsSP)  
  29. 29. Total  Wait     =     Queue  5me  +  Work  5me      
  30. 30. Different  kind  of  work  items  
  31. 31. Different  kind  of  work  items   10  minutes   1  minute  
  32. 32. Acer  a  few  months,  I  went  back   to  the  restaurant  and  took  a  look   at  their  kanban  system.  I  no5ced   that  all  orders  follow  a  single   queue.  
  33. 33. Single  Queue  
  34. 34. Please  help  me  out...  
  35. 35. What  is  the  wait  5me?  
  36. 36. Single  Queue  
  37. 37.   Queue  5me     between  30  and  40  minutes      4  large  orders;  1  being  worked   on,  3  in  the  queue;     each  large  order  takes  10   minutes    
  38. 38.   Work  5me     1  minute     a  small  order  takes  1  minute    
  39. 39. Total  Wait     =     Queue  5me     (between  30  and  40  minutes)   +     Work  5me  (1  minute)    
  40. 40. How  to  reduce     total  wait  5me?  
  41. 41. Two  Queues  
  42. 42. What  is  the  new  wait  5me   for  my  small  order?  (small   order  takes  priority)  
  43. 43. Paulo  Caroli                                                        Agile  Coach   pcaroli@thoughtworks.com Twitter: @paulocaroli      Op;mizingTheFlow.com   @paulocaroli   Thank  you!   Ques;ons?    

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