Inorder to complete the project succesfully and deliver a 
qualiyt product to the client we need to follow some 
rules/ethical steps.  Every company has their own style of 
life cycles both as SDLC AND STLC so there is no question 
of advantages and disadvantages of SDLC.

The issue comes only when we r in a confused state when we 
jump from one company to another.........

Hope u understood well.......

caynora

Yes, even i agree for the answer given

Advantages of SDLC model : 

With an SDLC Model, developers will have a clear idea on 
what should be or shouldn’t be built. Since they already 
have an idea on the problems that should be answered, a 
detailed plan could be created following a certain SDLC 
model. With an SDLC model, developers could even create a 
program that will answer different problems at the same 
time. Since everything will be laid out before a single 
code is written, the goal is clear and could be implemented 
on time. Although there is a great possibility of deviation 
from the plan, a good project manager will take care of 
that concern.



With an SDLC Model, programs built will have a clear 
documentation of development, structure and even coding. In 
case there are problems once the program is adopted for 
public use, developers will always have the documentation 
to refer to when they need to look for any loopholes. 
Instead of testing it over and over again which will stop 
the implementation for a while, developers will just look 
at the documentation and perform proper maintenance 
program. This means SDLC will breathe more life to the 
program. Instead of frustrating developers in guesswork if 
something goes wrong, SDLC will make sure everything goes 
smoothly. It will also be a tool for maintenance, ensuring 
the program created will last for a long time.

Disadvantages of SDLC Model:

Thinking about the disadvantages of a SDLC model is like 
looking for a needle in the haystack. But the closest 
disadvantage anyone could think of SDLC is the difference 
between what is written in paper and what is actually 
implemented. There are things that are happening in the 
actual work that the paper doesn’t see. This gives a good 
impression for the clients especially for 3rd party 
developers but when the software is actually launched it’s 
on a very bad situation. The actual situation of software 
development could be covered by fancy paperwork of SDLC.



Another disadvantage of a program or software that follows 
the SDLC program is it encourages stiff implementation 
instead of pushing for creativity in different software. 
Although there are SDLC models where programmers could 
apply their creative juices, it’s always in the realm of 
what is needed instead of freely implementing what the 
developers think of necessary in the present environment. 
There are so many things that could be done by developers 
if there are no boundaries or limitations in what should be 
developed.

See all the guy is not asking about adv and dis adv of SDLC 
models.
He is asking the adv and dis adv bet diff SDLC models
like diff bet waterfall,Vmodel etc.

Advantages of SDLC model :-

In SDLC model the user requirements are collected in the 
begning of the development so the users requirement become 
easy to understand so the developer can create a software 
which fullfill the requirement of the user.
In SDLC model analysis are done in the users place so that 
analyst can better understand the working of the user. And 
can create a better analysis to create the software.
In SDLC model the developer has the written documentation 
form which he can know the requirements of the user. So he 
can develop a good software. This means if the 
documentation is done in a good manner than the developer 
can create the software much better.


Disadvantages of SDLC model :-

As there are many advantages of the SDLC model but also 
there are many disadvantages of the SDLC model.
As SDLC model is completely based on the documentation done 
by the analyst, if the analyst has not done the analysis in 
a good manner then the created system/software will not 
produce a desired output.
SDLC model always suffer with over design sometime it 
offers many meaningless operations to do but doesn't offer 
the desired operations.
As we know that we cannot freez the requirement of the 
user/consumer. So, if the user changes his requirement in 
the mid of designing phase then it costs a lot sometime 
more than the cost of the project.
Sometime analyst chooses a platform which does not 
available with the user. So its costs a lot to the user to 
change the technology which he is currently using.
In SDLC There is a big disadvantage is the communication 
gap between the user and the anaylst/developer.

Advantage of the SDLC

@ Project Management
@ Documentation
@ Tried and tested Techniques

Disadvantages of the SDLC

@Inflexibility
@ Narrow Focus
@ Old Fashioned techniques
@Time and costs Overruns