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From: M. Lazarus
In your estimation, how much longer does it take to code an
application doing it with a GUI vs. green screen?
Generally speaking, it may take 5-20 times longer to write HTML, CSS, and JavaScript than display file DDS, depending on one's skill level.
But regarding application development in general, wouldn't one's productivity depend on whether the application fit a model or design pattern that they've already built before, or whether completely new code must be written?
Personally, I specialize in Web applications that follow pre-defined models, so my productivity in that respect is better now than it ever was at green-screen development.
Or allowing both, depending on what type the user prefers?
Personally, I don't think I would have gone to the trouble of developing models for Web applications if I didn't think I could come up with one that was more productive and offerred more features than the traditional IBM i "work with" model. Users prefer mine.
But your question raises a good point about modularizing code, following MVC design techniques, so you could do both. And my models separate DB I/O and business rules into modules that could interface with both browser and green-screen clients.
Their entire VAR / Business Partner model, which I recall going
way back, is based on the realization that IBM is NOT good at
the application stuff, so why not team up with the professionals
that ARE good at it?
You should meet the new IBM. They have been quietly, but systematically buying application development firms and building their custom technology group, and moving much of their development operations overseas.
That's not to say that IBM doesn't vasillate back and forth, appeasing business partners when they see fit, but their tendency is to move steadily into space that business partners previously occupied.
I have no doubt that if Rochester were to convert IBM i to a native GUI, the platform would take off. But at what cost? Who would license RDI-SOA? Who would need Websphere and all the configuration and performance management services that accompany it?
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