Answer / ajay

In high level designing the overall project will be divided
into modules...........

Where as in low level desigingn the modules are divided
into sub modules and the acutal coding will be done....

And this is done in the designing phase

Answer / ashutosh singh

HLD
Based on SRS software analysts will convert the
requirements into a usable product. They will design an
application which will help the programmers in coding.In
the design process the product is to be broken into
independent modules and then taking each module at a time
and then further breaking them to arrive at micro levels
The HLD document contains the following items at a macro
level: - list of modules and a brief description of each
module - brief functionality of each module - interface
relationship among modules -dependencies between modules -
database tables identified along with key elements -
overall architecture diagrams along with technology
details.

LLD:
System analysts prepare a micro level design document
called LLD. This document describes each and every module
in an elaborate manner so that the programmer can directly
code the program based on this. There will be at least 1
document for each module and there may be more for a
module.The LLD will contain: - deailed functional logic of
the module in pseudo code - database tables with all
elements including their type and size - all interface
details with complete API references(both requests and
responses) - all dependency issues -error message listings -
complete input and outputs for a module.

Answer / ganesh

HLD:

High – level Design gives the overall System Design in
terms of Functional Architecture and Database design. It
designs the over all architecture of the entire system from
main module to all sub module. This is very useful for the
developers to understand the flow of the system. In this
phase design team, review team (testers) and customers
plays a major role. For this the entry criteria are the
requirement document that is SRS. And the exit criteria
will be HLD, projects standards, the functional design
documents, and the database design document. Further, High
level deign gives the overview of the development of
product. In other words how the program is going to be
divided into functions, modules, subdivision etc.

LLD:

Low – Level Design (LLD): During the detailed phase, the
view of the application developed during the high level
design is broken down into modules and programs. Logic
design is done for every program and then documented as
program specifications. For every program, a unit test plan
is created. The entry criteria for this will be the HLD
document. And the exit criteria will the program
specification and unit test plan (LLD).
The Low Level Design Document gives the design of the
actual program code which is designed based on the High
Level Design Document. It defines Internal logic of
corresponding submodule designers are preparing and mapping
individual LLD's to Every module. A good Low Level Design
Document developed will make the program very easy to be
developed by developers because if proper analysis is made
and the Low Level Design Document is prepared then the code
can be developed by developers directly from Low Level
Design Document with minimal effort of debugging and
testing.

Answer / harshini

HLD - High Level Design
Here the design will show the links of the pages from one
to another

LLD - Low Level Design
Here even the database links are discussed.

Answer / vishvam

HLD: IT DESCRIBES NUMBER OF MODULES FOR A PROJECTS AND RELATIONS BETWEEN THOSE MODULES.

EX:FOR A (HOSPITAL MANAGEMENT SYSTEM)

LLD:THERE WILL BE INDIVIDUAL 'LLD' FOR EACH MODULES .IT IS DESCRIBES INTERNAL LOGIC OF EACH MODULES WITH HEIP OF DATA FLOW DIAGRAM AND ENTITY-RELATIVE DIAGREM IS ORDER TO DEVELOP THE LOGIC WHITE THE PROGRAM.

NOTE:DESIGN DOCUMENT ARE IMPORTANT FOR DEVELOPERS IN ORDER TO
WRITE THE PROGRAM.

Answer / rashmi garg

for exact definition and difference visit the URL
http://productdevelop.blogspot.com/2007/09/difference-
between-hld-and-lld.html

Answer / parasuraj.k

High Level Design(LLD) :It design the over all architecture of the entire system from main module to all sub module.

Low Level Design(LLD) :It defines Internal logic of corresponding submodule designers are preparing individual LLD to Every module.
(OR)
High Level design gives overall view of the system while in LLD gives detailed view.

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