Pace 58 |

APPLIED INTELLIGENCE

The Company and the CASE Tool:

prise modeling and business-area
analyses. se
The choice between a methodology

Making the Match:

ment provided by integrated CASE
tools, there are many reasons why or"

prototyping methodologies.

In evaluating integrated CASE products on the left

Js lll zne oe an)

— said, |
Another enticement, to travel down the |
OS/2 development, path, according to re-

match the func-
tional needs of

i 5 4
zad bi, pi
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| an application from design speciti-
| cations;
|  non-integrated tools that generate
| fragments of an application but re-

guire some hand-generated code out:

| side of the CASE tool;

6 tools that support. an information
engineering methodology;
€ tools that support. a structured engi-

| neering methodology;

8 tools that support; C code generation
for engineering workstations in a Unix

s " si z

9 tools that

"a,

pport real-time appli-

| cations.

The figure shows a series of gues-

| tions that companies can ask to help
| them determine how to categorize the

Integrated CASE tools fitting that

back end. Tightly integrated tools are
recommended to support rapid

Migration 1 More Firms Traveling the OS/2 Development Path

Continued from Page 57?

real-time Unix operating system for his
assembly-line automation system, he ve-
toed it in favor of OS/2 to avoid being tied

to one vendor. "We wanted to use a gener-.

al-purpose

rating system like OS/2," he

spondents, is that operating system's add-

- ed horsepower—particularly its multi-

 tasking capabilities and built-in communi-
cations and database support. 52

For Paul Morales, these bonuses trans.

lated into a powerful environment, in
which to create a front end to a main:
(rame-based insurance policy system,

"We needed to do several types of host

sessions and have them up and running at
the same time," said Morales, a senior
project engincer at Eguitable Financial

st ArowredpeMare

| OSP eV5

Ouestlons To Ask WHeH Choosine a CASE Tool!

|! project-level,
then it I8 aH:
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pope (m S —-
Integrated Integrated
—-]. Informatlon« | slructured-
| engineering tool

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(hen IH

» CGI Systems
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» Pansophle | — |
/ Systems! | |
, Sage Software |
" This tool is fully. |
integrated, but —
does not supporl |

informatlonor -1——- h seči

struciured | |

engineering. pesti]

plications. It is generally not concerned

with higher-level issues such as enter-

While OS/2 furnishes communications
capabilities for building cooperative-pro-
cessing applications, its real strength lies
in networking, according to some of the re-
spondents.

— "Where OS/2 really shines is in LAN
support, because we can easily connect
08/2 machines to our Token-king net:
work," snid Greg Barnes, a programmer/
-analyast for Farmland Ine., a farm coopera-
ve in Kansna Cily, Mo. This makes |. easi-

er to distribule commodities and market
informnatlon to 400 PCs on a local area

network, he anld, o

08/2 communications capabilities also
provide developers with an entry into the

— malnframe world,

—"We have an AS/400 [minicomputer]
ane IDM 3000 mainframes, and providing

connectlvity to those platforms is the lead- —
ing renson to go to OS/2," said Gregory

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Hi: | ca listed on the left. side of are best supported by an information simple methodology that.s widely used more information on this volume,
ded ia sita. Non-integrated tools that engineering methodology that works by many organizations. Information en- cal ( 61 7) 639-1958. For in formation

| | generate fragments of an application top-down from enterprise models and gineering is a more complex methodolo- on seminars, contact (in the United

| are listed on the right. business-area analyses to the design of gy that isn t as widely used. However, States and Canada) Technology

li: There are only a small number of in- individual projects. information engineering is the recom- Trans fer I nstitute, 741 10th St., San:
| | tegrated tools that provide tight inte- Structured engineering is widely used mended methodology if strategic appli- ta Monica, Calif. 90402 (213) 394-
gration between the front end and the for the development of project-level ap- cations are to be built that will progres- 8305. In Europe, contact Savant, 2

sively computerize all functions of the
organization.

While many respondents found OS/2 de-
velopment more time-consuming than ex-
pected, they said the operating system's
palette of programming tools and built-in
debugging facilities are far superior to
those of DOS.

"0S/2 helped us to make a better-guali-
ty program," said Andrew Fischer, a pro-
grammer for Vector Software Inc., a soft-
ware developer in New York. "We found
bugs under OS/2 that we would never
have found under DOS,"

OS/2 is clearly meeting the needs of
some developers, yet a significant number
are still hesitant about. moving over. The
biggest, hurdles, respondents noted, are the
initial investment, in hardware upgrades

and incompatibilities with the still-domi-
nant DOS world,

"We were developing in OS/2 but put it
aside because of incompatibility with

omnuter-aided — side of the diagram are further subdi- Mas dMA nr izi, »nizations should consider non-inte-
vele engi- —  vided into tools that support strategic based on information engil o EEA bosi prated PE!
neering (CASE) applications and those that are oriented  structured engineering ksi ooo išjdŠne Current integrated tools do not sup-
tools, it's impor- primarily toward project-level applica- by the corporate culture tor applic port. C code generation, the Unix envi-
tant to divide tions. Strategic applications that may be development. vgineering is a relatively ronment, real-time applications, trace-
iča paper used across divisions of an organization Structured engineering | zah ability and other important functions.
gories tnat

Several of the non-integrated tools do
support these functions. |
Tools on the right side of the dia-

| NUNE S an organization. Pi — EV Tv ram may be further subdivided by
JAMES šič Si ni Does the tool abit li. code POL1VO tedni db, aaa eti air the guestion: Does the tool sup-
UHitih: ze inclu« e the yes, then ask: li Ho, then ask: —— mipno —- z port all three diagram types of struc-
MARTIN s inezaa AHA EN Ele —— | a j vy" TUT Mi tured engineering, including ata ME
| SA kača Will it be used to bulld strategic kiji | Does the todi $Upport all three , diagrams, decomposition diagrams an
generating 100 percent o ee ič or project-level applicatlons? V O Y Structur od eriglieerirg didgrams ; entity-relationship diagrams?

Non-integrated tools that do not sup-
port the three basic diagram types are
typically used as niche products for a
portion of the development life cycle—
for example, data modeling, source-
code scanning and source-code restruc- |
turing.

The figure is oriented toward the se-
lection of CASE products to support
business applications in an IBM target
environment. Reguirements to support | kia,

orkstations, generation of C code and

support of real-time applications,

- would substantially change the catego-
rization of CASE products.

Next week, I will discuss the future
evolution of CASE products. 8

| | tools. The top-level guestion is: Does o, a Vourdon Soilwate.—- le RANE N  NEETUTNET NE EV
the tool generate code for 100 percent RE pali kosit ca SEREA The concepts e' bc ted in this article
Mt | of an application? John Avakan " are described in the CASE volume tn

The James Martin Report Series. For |

New St., Carnforth, Lancs., LA5 9BX
United, Kingdom (0524) 734 505.

While users expect, these issues to be
resolved in the next few years, several are
eying Microsoft Corp.s Windows as a
short-term alternative because of its
graphical user interface and limited multi-
tasking abilities. —

"Wetre going to Windows whole-hog in
the short term," said Steve Silver, a vice
president at Chase Manhattan Bank in. .
New York. "There's less resistance to.
putting a GUI over DOS."

Other respondents said they prefer to
wait for OS/2 version 2.0, the full 32-bit. im-
plementation of the operating system
that's due later this year.

"| look to OS/2 2.0 to be the first OS/2
that users will want, because they can get
to it easily," said Rick Stuckey, a partner in
Andersen Consulting, the Chicago-based
consulting arm of accounting firm Arthur

Andersen € Co.
Brunet, a systems analyst for Waste Man- what we' e" gal "Hardt ive,"
Cos., insuranc nit a or Waste Man- what we'd developed bef said Alon Hardware won't, be as expensive, he
York. » Ueinsurance company. in. New agement Inc,, a waste treatment center in elo! ei

Oak Hrook, Ill.

Miller, a partner in Alon Miller Associates,
a consulting firm in Staten Island, N.Y.

said, "and faster processors will bring
down the cost of OS/2 machines." H

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