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Conference bulova::decw_jan-89_to_nov-90

Title:DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:STAR::VATNE
Created:Mon Oct 30 1989
Last Modified:Mon Dec 31 1990
Last Successful Update:Fri Jun 06 1997
Number of topics:3726
Total number of notes:19516

3325.0. "Wanted info: comparison of maintenence costs between classical application & DW application" by MQOU02::CHEVRIER (Michel A. Chevrier 632-3560 Montr�al) Mon Sep 10 1990 15:42

A customer is about to add DW to its applications' interface building tool.

Before jumping into using DW they had a question
about the maintenance costs of a DW interface compared with something
like FMS or even direct screen access by applications.  Is there 
any data about that or even semi-quantified gut feel?

The same question came about the development time using DW compared 
classical methods.

Thanks,
Michel.
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3325.1DSSDEV::BIBEAULTGrizzly BearTue Sep 11 1990 09:4726
   I don't believe that there are any formal quantified studies in this area,
   but have asked the forms product manager if he's heard of any.

   Firstly, be aware that you are asking for a comparison of oranges and
   lemons (at least they're both citrus). FMS and the like are user interface
   tools for character-cell terminals only -- DECwindows is a graphical user
   interface tool.

   What kind of interface does your customer need? The type that can be built
   with the toolkit would be very different from the type built using FMS.

   Given that, I'd suspect that the amount of maintanence work that would need
   to be done with a Toolkit application versus an FMS application would be
   pretty much the same as both systems are fairly low level and require the
   application program to get involved in all but setting up the appearance
   of the UI, and both require data conversions for numeric data prior to
   sending such data to the display. 

   A higher level system, like DECforms, will require less maintanence since
   there's a lot less application code and no data conversions necessary, but
   a DECwindows version of DECforms, although a high priority, may still be a
   little ways off. The character-cell version is shipping and doing very
   well.

-mike
3325.2The customer needs bothMQOS01::CHEVRIERMichel A. Chevrier 632-3560 Montr�alTue Sep 11 1990 17:1521
The customer has already a large FMS expertise and will continue
to use FMS for a long time(I guess).  The question was not to decide which is 
best.  They will continie to use FMS for their character cell terminals
applications and maybe choose DW for the workstations applications.

Because they are FMS users they have a good feel for 
the costs of maintenance and exploitation for FMS applications.
The question is now that they plan to use DW for some of their 
aplications will that new interface software see the same maintenance
and exploitation cost that their FMS software or a reduction/increase.

   >What kind of interface does your customer need? The type that can be built
   >with the toolkit would be very different from the type built using FMS.

Yes in appearance and interface actions.  Right now they have an application
that runs all on character cell term and they want a part of it to be
transformed into a DW interface (more sexy and reduced operation errors).

Thanks for taking time to volunteer your opinion.  It is appreciated.

Michel.