Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.forth > #15193

Re: Function Points

From "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk>
Newsgroups comp.lang.forth
Subject Re: Function Points
Followup-To comp.lang.forth
Date 2012-08-27 15:52 +0100
Organization Hidecs Consultancy
Message-ID <aa1fv9F6tvU1@mid.individual.net> (permalink)
References (7 earlier) <503929e3$0$283$14726298@news.sunsite.dk> <7xfw7aipyk.fsf@ruckus.brouhaha.com> <k8OdnXT2-6VEz6TNnZ2dnUVZ_hCdnZ2d@supernews.com> <aa135hF50vU1@mid.individual.net> <86b6066f-415d-4632-a8d3-3fbc28ab01ba@n9g2000yqn.googlegroups.com>

Followups directed to: comp.lang.forth

Show all headers | View raw

Mark Wills wrote:

[%X]

>> Writing a whole page of code at a time just has the wrong feel to doing
>> the job right. Concentrate on the correctness of one function at a time,
>> review the intent (as expressed in the glossary text you wrote to specify
>> what was to happen) and test each word as you complete it (ensuring it
>> meets the specification of the glossary). On this basis I built the
>> techniques for certification of Forth code to ensure compliance with
>> specification. No real hunting required for the hidden bugs as you should
>> expunge them as you go to ensure they are not introduced in the first
>> place. Of course, you need to really concentrate on getting the
>> specification right first.

> Agreed. And you also have to accept that you can't get your
> documentation 100% perfect up-front. It's just a fact of life that
> you'll discover something during the physical implementation that may
> require you to add a new function (perhaps to handle an unanticipated
> exception, for example) that will require you to re-vist and update
> your documentation.

This is so true too. I estimate that you will probably visit each part of 
the system 3 times during development (especially working on critical 
systems).
 
> It's not Necessarily a design failure. It's just reality!
> 
> We spend weeks working on up-front software documentation. Working in
> the mission-critical oil and gas business, it's just a normal part of
> the design process. 

Do you have a good grasp of the total concept at that time or is the 
specification still a collection of "I would like" type items? I have seen 
many organisations that do the up-front documentation on half baked design 
specs that still have lots of un-answered questions. The trick is usually to 
be a lot clearer about the full explicit requirements that will mean mission 
success early enough, even if all the fine details haven't yet emerged. This 
may take a number of review sessions that truly walk the problem space 
before the design really begins.

> We're pretty good at it (we can design to SIL-1 on
> our in-house designed and manufactured controllers) but we still come
> across issues that we failed to anticipate, despite numerous peer
> reviews and design reviews! They're never show-stoppers, but there's
> always a gotcha lurking in there somewhere!

There is no reason why you shouldn't deal with SIL-3 or SIL-4 requirements 
if you are able to improve your early design and development processes. 
Eliminate the systematic bugs before they get into the system design and you 
save a lot of time, effort and money in the later stages.

-- 
********************************************************************
Paul E. Bennett...............<email://Paul_E.Bennett@topmail.co.uk>
Forth based HIDECS Consultancy
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-510979
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
********************************************************************

Back to comp.lang.forth | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Comparative Productivity of Programming Languages visualforth@rocketmail.com - 2012-08-21 21:43 -0700
  Re: Comparative Productivity of Programming Languages "A. K." <akk@nospam.org> - 2012-08-22 07:07 +0200
  Re: Comparative Productivity of Programming Languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-22 03:35 -0500
    Re: Comparative Productivity of Programming Languages John Passaniti <john.passaniti@gmail.com> - 2012-08-22 14:06 -0700
      Function Points (was: Comparative Productivity of Programming Languages) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-23 14:50 +0000
        Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-23 11:43 -0700
          Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-25 14:13 +0000
            Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-25 10:12 -0700
              Re: Function Points Doug Hoffman <glidedog@gmail.com> - 2012-08-25 15:39 -0400
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-25 15:09 -0700
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-08-25 12:34 -1000
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-25 16:43 -0700
                Re: Function Points jacko <jackokring@gmail.com> - 2012-08-25 18:05 -0700
                Re: Function Points jacko <jackokring@gmail.com> - 2012-08-25 20:34 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-26 03:24 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-25 22:44 -0700
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-08-25 21:19 -1000
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-26 00:36 -0700
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-08-25 21:50 -1000
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-26 01:08 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-26 23:20 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-26 19:33 -0700
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-27 13:34 -0500
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-27 22:38 +0200
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-28 02:45 -0500
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-27 18:14 -0700
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-27 18:24 -0700
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-30 14:22 +0000
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-28 03:07 -0500
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-28 08:18 -0700
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-28 12:15 -0500
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-28 23:05 -0700
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-29 03:55 -0500
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-27 22:28 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-27 20:26 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-28 23:17 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-29 01:13 -0700
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-29 02:23 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 02:59 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-29 22:18 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 20:44 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-31 01:29 -0700
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-31 09:33 +0000
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 02:58 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-29 19:39 -0700
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-30 14:10 +0000
                Re: Function Points gavino_himself <visploveslisp@gmail.com> - 2012-08-30 20:08 -0700
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-08-30 17:47 -1000
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-08-27 13:43 -1000
                Re: Function Points "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-08-27 12:14 +0100
                Re: Function Points Mark Wills <markrobertwills@yahoo.co.uk> - 2012-08-27 05:12 -0700
                Re: Function Points "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-08-27 15:52 +0100
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-26 13:09 +0000
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-27 20:52 -0700
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-30 14:08 +0000
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-30 10:43 -0700
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-08-30 08:25 -1000
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 22:42 +0200
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-31 01:23 -0400
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-31 03:08 -0500
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-31 18:56 -0400
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-01 02:35 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-31 23:52 -0700
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-01 14:27 +0000
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-01 14:18 +0000
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-01 17:45 +0200
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-01 16:14 +0000
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-01 19:13 +0200
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-09-02 03:19 -0500
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-01 16:18 -0400
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-02 03:04 +0200
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-02 04:02 -0400
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-02 17:40 +0200
                Re: Function Points jim@rainbarrel.com - 2012-09-02 10:32 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-02 20:49 +0200
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-02 16:33 -0400
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-02 17:03 -0400
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-09-02 09:02 -1000
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-02 16:35 -0400
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-09-02 13:42 -1000
                Re: Function Points jim@rainbarrel.com - 2012-09-02 16:54 -0700
                Re: Function Points Mark Wills <markrobertwills@yahoo.co.uk> - 2012-09-03 00:29 -0700
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-03 01:30 -0400
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-09-02 21:21 -1000
                Re: Function Points jim@rainbarrel.com - 2012-09-03 10:37 -0700
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-04 07:14 +0000
                Re: Function Points Coos Haak <chforth@hccnet.nl> - 2012-09-03 21:12 +0200
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-03 17:32 -0400
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-03 17:51 -0400
                Re: Function Points John Passaniti <john.passaniti@gmail.com> - 2012-09-03 22:37 -0700
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-04 04:25 -0400
                Re: Function Points John Passaniti <john.passaniti@gmail.com> - 2012-09-04 07:35 -0700
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-05 02:13 -0400
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-09-04 20:18 -1000
                Re: Function Points John Passaniti <john.passaniti@gmail.com> - 2012-09-05 10:56 -0700
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-05 16:11 -0400
                Re: Function Points John Passaniti <john.passaniti@gmail.com> - 2012-09-05 14:07 -0700
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-02 16:27 -0400
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-03 00:52 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-02 16:28 -0700
                Re: Function Points jim@rainbarrel.com - 2012-09-02 16:48 -0700
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-02 20:21 -0400
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-09-02 14:45 -1000
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-03 01:12 -0400
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-09-02 21:26 -1000
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-03 01:06 -0400
                Re: Function Points Mark Wills <markrobertwills@yahoo.co.uk> - 2012-08-31 03:29 -0700
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-31 10:35 +0000
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-31 18:49 -0400
                Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-01 14:49 +0000
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-09-01 08:36 -1000
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-01 16:11 -0400
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-03 01:58 +0200
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-01 17:54 +0200
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-01 16:19 -0400
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-02 03:05 +0200
                Re: Function Points Coos Haak <chforth@hccnet.nl> - 2012-08-31 23:10 +0200
                Re: Function Points "Elizabeth D. Rather" <erather@forth.com> - 2012-08-31 15:50 -1000
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-01 10:31 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-01 21:52 +0200
                Re: Function Points "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-09-01 16:36 -0400
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-01 14:36 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-02 03:30 +0200
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-02 23:15 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-02 15:02 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-03 01:50 +0200
                Re: Function Points jim@rainbarrel.com - 2012-09-02 16:57 -0700
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-03 23:11 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-04 14:30 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-04 10:14 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-04 22:10 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-06 00:19 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-06 17:48 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-06 12:01 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-06 22:02 +0200
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-09-06 14:19 -0700
                Heap (was: Function Points) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-07 11:30 +0000
                Re: Heap (was: Function Points) Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-07 18:12 +0200
                Re: Heap (was: Function Points) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-07 16:48 +0000
                Re: Heap (was: Function Points) Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-07 21:34 +0200
                Re: Heap Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-09-07 22:04 +0100
                Re: Heap anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-08 11:52 +0000
                Re: Heap Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-08 22:48 +0200
                Re: Heap (was: Function Points) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-08 12:11 +0000
                priority queue (was: Function Points) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-03 11:46 +0000
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-03 15:03 +0200
                Re: Function Points mhx@iae.nl (Marcel Hendrix) - 2012-09-03 22:36 +0200
                Re: Function Points mhx@iae.nl (Marcel Hendrix) - 2012-09-06 20:27 +0200
                Re: Function Points Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-09-02 04:00 -0500
                Re: Function Points visualforth@rocketmail.com - 2012-09-03 10:40 -0700
                Re: Function Points Bernd Paysan <bernd.paysan@gmx.de> - 2012-09-03 20:26 +0200
                Re: Function Points Doug Hoffman <glidedog@gmail.com> - 2012-08-27 11:49 -0400
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-27 09:16 -0700
                Re: Function Points Josh Grams <josh@qualdan.com> - 2012-08-28 22:46 +0000
                Re: Function Points jacko <jackokring@gmail.com> - 2012-08-28 16:06 -0700
                Re: Function Points Doug Hoffman <glidedog@gmail.com> - 2012-08-28 20:50 -0400
              Re: Function Points anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-26 12:59 +0000
                Re: Function Points Paul Rubin <no.email@nospam.invalid> - 2012-08-26 22:24 -0700
        Re: Function Points (was: Comparative Productivity of Programming Languages) John Passaniti <john.passaniti@gmail.com> - 2012-08-23 15:02 -0700
          Re: Function Points (was: Comparative Productivity of Programming Languages) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-25 14:57 +0000
  Re: Comparative Productivity of Programming Languages "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-22 08:07 -0400
    Re: Comparative Productivity of Programming Languages visualforth@rocketmail.com - 2012-08-22 08:12 -0700
  Re: Comparative Productivity of Programming Languages visualforth@rocketmail.com - 2012-08-22 07:37 -0700

csiph-web