Software Development Life cycle

Summary

This video delves into the Software Development Lifecycle (SDLC), explaining its importance and stages. It emphasizes that without following SDLC, companies risk not understanding project requirements, investment needs, and potential profits or losses. The script outlines the roles of various team members, from business analysts to developers, detailing the stages from requirement collection to maintenance. It uses examples like constructing a house to illustrate high and low-level design, and discusses the importance of testing and implementation. The video aims to clarify the SDLC process in an accessible manner, encouraging viewers to engage with the content.

Takeaways

• 🔍 The Software Development Lifecycle (SDLC) is a structured process that software development goes through, from inception to maintenance.
• 👨‍💼 Requirement collection is the first stage of SDLC, where a product analyst or business analyst gathers requirements from customers.
• 💼 The feasibility study is a critical phase where the decision to proceed with the project is made, considering resources, lab setups, and technology.
• 🛠️ The design phase is divided into high-level and low-level design, focusing on the architecture of the application and detailed component layouts.
• 🏗️ High-level design is like planning the structure of a house, while low-level design is akin to detailing each room's layout and features.
• 💻 Coding is the phase where developers write the actual code for the software, following the guidelines set by the low-level design.
• 🔬 Testing is an essential phase where the software is rigorously tested to ensure it meets the requirements and functions correctly.
• 🔄 Installation and implementation involve deploying the software at the customer's site and ensuring it's ready for use.
• 🔧 Maintenance is the final phase of SDLC, where developers and QA engineers provide support and address any issues post-deployment.
• 📝 Service Level Agreements (SLAs) define the maintenance period, typically for six months or a year, during which support is provided to the customer.

Q & A

What is the purpose of the Software Development Lifecycle (SDLC)?

The purpose of SDLC is to provide a step-by-step procedure or standard procedure for developing new software, ensuring that the software meets the requirements, is cost-effective, and is profitable for the company.

Why should a company follow the SDLC?

A company should follow the SDLC to understand the requirements, estimate the investment needed, predict the profit or loss, and determine the resources required for the development of the software.

What are the roles of a Product Analyst and a Business Analyst in the SDLC?

A Product Analyst works in product-based companies to define the product requirements, while a Business Analyst collects requirements from the customer, translates them into business language, and then communicates these requirements to the technical team.

What is the significance of the Feasibility Study in the SDLC?

The Feasibility Study is crucial as it helps in deciding whether to take up the project or not, based on factors like resource availability, lab setup, and the technology required for the project.

Who are the key stakeholders involved in the Feasibility Study phase of SDLC?

The key stakeholders involved in the Feasibility Study phase include the Product Manager, Finance Team, HR, Architects, and Business Analysts.

What is the role of a Product Manager in the SDLC?

The Product Manager takes data from the Business Analyst and other stakeholders, synthesizes it, and makes decisions regarding the project's direction, including whether to proceed with the project.

What are the two types of design stages in the SDLC?

The two types of design stages in the SDLC are High-Level Design, which defines the architecture of the application, and Low-Level Design, which details how each component of the application will look like.

Can you provide an example of High-Level Design?

An example of High-Level Design could be planning the layout of a house, deciding on the number of rooms, the location of the kitchen, and the placement of common areas.

What is the main activity performed during the Coding phase of SDLC?

During the Coding phase, developers start writing the code for the software based on the Low-Level Design documents and the requirements gathered by the Business Analyst.

What happens during the Testing phase of the SDLC?

In the Testing phase, the software is rigorously tested to ensure it works as intended. This is done by the QA team, who act as a bridge between the developers and the end-users.

What is the purpose of the Installation and Implementation phase in SDLC?

The purpose of the Installation and Implementation phase is to deploy the software at the customer's location, ensuring it is set up correctly and the customer can start using it for their business operations.

What does the Maintenance phase of SDLC involve?

The Maintenance phase involves ongoing support and updates to the software after it has been delivered to the customer. This includes fixing defects, making improvements, and handling any issues that arise during the agreed service level agreement period.

Outlines

00:00

📚 Introduction to Software Development Lifecycle (SDLC)

This paragraph introduces the concept of the Software Development Lifecycle (SDLC), emphasizing its importance in the systematic development of software. It explains that SDLC is a structured process involving various stages that a company must follow to understand requirements, estimate costs, predict profits or losses, and determine the resources needed. The paragraph also highlights the roles of different professionals such as product analysts, business analysts, architects, developers, product managers, and QA engineers in the initial stage of requirement collection and analysis.

05:00

🛠️ SDLC Stages: Feasibility Study and Design

The second paragraph delves into the specifics of the SDLC, focusing on the feasibility study and design stages. It describes how a project's viability is determined by considering resources, lab setups, and technological capabilities. The roles of the product manager, finance team, HR, architects, and business analysts in making the 'go or no-go' decision for a project are also discussed. The design phase is then broken down into high-level and low-level design, with examples provided to illustrate the difference between the two. High-level design refers to the overall architecture, while low-level design pertains to the detailed functionality of each component.

10:02

🔧 Implementation and Maintenance in SDLC

The final paragraph covers the latter stages of the SDLC, including coding, testing, installation and implementation, and maintenance. It explains that after the design phase, developers begin coding based on the low-level design documents. The business analyst acts as a bridge between the customer and developers. Once coding is complete, the software undergoes testing, followed by installation and implementation at the customer's site. The paragraph concludes with a discussion on the maintenance phase, where developers and QA engineers provide ongoing support and updates as per the service level agreement with the customer. Any modifications requested after the agreement period would require additional payment.

Keywords

💡Software Development Lifecycle (SDLC)

SDLC refers to the process of creating software, from the initial requirements gathering to the final maintenance phase. It is the central theme of the video, as it outlines the structured approach a company should follow to develop software efficiently. The script mentions that not following SDLC can lead to a lack of understanding of requirements, investment, and profit, which emphasizes its importance in the software development process.

💡Requirement Collection

Requirement Collection is the first stage of SDLC where the needs and specifications of the software are identified. It is performed by a product analyst or business analyst who interacts with customers to understand their needs and translates them into technical requirements for the development team. The script uses the example of a business analyst going to the customer site to collect requirements and then communicating them to the company's technical team.

💡Product Manager

A Product Manager is responsible for the vision and strategy of a product. In the context of SDLC, the product manager takes data from the business analyst and architects to make decisions about the project's direction and feasibility. The script highlights the role of the product manager in deciding whether to take up a project based on the data and requirements collected.

💡Business Analyst

A Business Analyst is a professional who communicates with customers to understand their business needs and translates them into technical language for the development team. The script describes the business analyst's role in the requirement collection phase, emphasizing their importance as a bridge between customers and developers.

💡Feasibility Study

Feasibility Study is the second stage of SDLC where the project's viability is assessed in terms of resources, lab setups, and technology. It involves various stakeholders, including the product manager, finance team, HR, and architects, who decide whether to proceed with the project based on its potential for profit and the availability of necessary resources. The script explains this stage as a critical decision point in the SDLC.

💡Design

Design in SDLC involves creating the architecture and layout of the software application. It is divided into high-level design, which outlines the overall structure, and low-level design, which details each component. The script provides examples such as constructing a house or using an email application to illustrate the concepts of high-level and low-level design.

💡Architect

An Architect in the software development context is responsible for the technical aspects of the project, including choosing the appropriate technology and designing the system's infrastructure. The script mentions the architect's role in the design phase, where they consider the technical perspective of the project.

💡Coding

Coding is the phase where developers write the actual code for the software based on the designs created in the previous phase. It is a crucial part of the SDLC where the software's functionality is implemented. The script mentions that developers start coding after the design phase is completed.

💡Testing

Testing is the phase where the software is evaluated to ensure it meets the requirements and functions correctly. It involves finding and fixing defects before the software is delivered to the customer. The script refers to testing as an essential step after coding to ensure the software works perfectly.

💡Implementation

Implementation is the stage where the developed software is installed and set up at the customer's site, enabling them to start using it for their business operations. The script describes the role of engineers in going to the customer's location to install and prepare the software for use.

💡Maintenance

Maintenance is the final phase of SDLC, where the software is continually improved and supported after it has been delivered to the customer. It involves fixing any issues that arise and making updates as needed. The script explains that maintenance is carried out by developers and QA engineers, often for a specified period as per a service level agreement.

Highlights

Introduction to the Software Development Lifecycle (SDLC) and its importance in the development process.

Explanation of the term 'Software Development Lifecycle' and its stages.

The necessity for companies to follow SDLC to understand requirements, investment, and potential profit or loss.

The role of a product analyst and business analyst in requirement collection.

The decision-making process in SDLC regarding whether to take up a project based on feasibility study.

Involvement of product manager, finance team, HR, architects, and business analyst in project feasibility discussions.

The importance of resources, lab setups, and technology in project acceptance decisions.

The role of a product manager in gathering data and making project decisions.

Introduction to the design phase of SDLC, including high-level and low-level design.

Examples provided to illustrate the difference between high-level and low-level design.

The transition from design to coding phase, where developers write code based on low-level design.

The role of the business analyst as a bridge between customers and developers.

The testing phase in SDLC, which follows coding to ensure software functionality.

The installation and implementation phase, where software is set up at the customer's site.

The maintenance phase as the final stage of SDLC, focusing on post-deployment support and updates.

Service level agreements and their role in defining maintenance periods and customer support.

The process of modifications and additional payments for customers post-service level agreement.

Encouragement for viewers to reach out with questions and an invitation to like, subscribe, and share the video.

Transcripts

hi guys welcome you ordered another

video of software testing by M K T so in

this video we're gonna talk about

software development lifecycle before we

start with this video make sure that you

are subscribed to my channel let's get

started so in this video we are going to

talk about what do you mean by software

development lifecycle C as the name

suggests software development life cycle

whenever software any company is

developing what are stages is it goes

through that is part of software

maintenance second actual definition

says that software development lifecycle

it is a step-by-step procedure or a

standard procedure to develop any new

software is called a socket like sector

now why company should follow SDLC

software development lifecycle or what

would happen if they don't follow SDLC

if company don't follow SDLC they will

not come to know what is the requirement

first of all they will not get to know

how much money to invest in it they will

not get to know what will be the profit

or loss at the end of the at the end and

they will not get to know how many

ingenious they need to involve in making

their software so for that purpose

company always follow software

development life cycle so if we talked

about the stages we have in software

development life cycle the stages we

have are listen the early guys the first

stage is college requirement collection

first stage is chorus requirement

connection that means there are the

question arises who do the requirement

touch requirement collection is done by

product analyst product analyst is the

person who will be in the product based

companies and business analyst is the

person who will do the requirement

collection in the service response I'm

going to take an example of

so this okay so be a business analyst he

will go to the customer piece he will

correct the requirement in the business

language he will come back to the

company convert everything he has

understood in the business language to

technical things and he gonna explain it

to the technical team technical team

consisting of architects developers

product head that is product managers

and QE q ingenious this was the first

step the second stage of SDLC is called

as easy beauty study now physically this

study is nothing but in this stage they

define rather to take up the project if

they are going to take up the project

are they going to get any profit or not

so this is the stage where they decide

whether you take up the project or not

this stage consisting of different

themes the first the first one the first

person is called as product head or

product manager the second is finance

team HRT architects and business I just

these are the people who decide whether

to take up the project or not they may

talk about three things whether they

have enough resources to take off the

project when I talked about the

resources I mean whether they have

proper engineers developers NQ it to

take up the project or not do the second

is do they have proper lab setups or not

do they have proper lab setups about I

mean if the big of the project lab

setups required

are they having it and the third is

which are they having the technology to

take up the project or not so the

designer on the screen mainly thinks

decide whether to take up the project or

not now I'm going to talk about the role

of product manager he is the person who

will take the data from business analyst

arcattack finished him and a charting

and he is the person who will decide

whether to take of the project ah ba ba

is a person who will correct the

requirement as I have already said his

role is to correct the requirement he is

going to requirement and architect is a

person who will think from the technical

point of view that means which

technology to follow to take up the

project finance team they were thing

from the money point of view if they are

going to take the project are they going

to get any profit or not if the English

dismiss or money are they going to

return anything are they going to get

properly so an attractive actually more

technical teams of people who've written

that they've got this many ingenious in

the product so it is the job of the

exciting to hire those people he will

collect product hand that is product

product manager he will take the data

from everyone and he will segment who

think of the project or not I have

explained in a very easy language third

third stage of software development

lifecycle is called as design design is

in design we have two things one is high

level design other one is low level

design high level design is a design the

architecture of the application how the

application you will look like that is

for high level design if I talk about

the lower level design how each and

every models will look like that is

called as low level design so I hope I

mean if I'm going to give you the

example imagine understand give me a

very better way let us take example that

I have come I have bought a site have

bought a site now I have decided that I

am going to construct in that I am going

to construct one room one hall one

kitchen to wash poops one lawn one

parking area this is - I mean I

these are things I'm gonna make in my

site which I have bought that is for

this high level design now what is low

level design

suppose my site is like this this is the

increase I will be having a forum here

with that attached motion will be that

with that attached living room should be

there with that attached kitchen should

be there here launched should be that

help button should be that talking

everything in detail is called as low

level design

I'm gonna give you one more example

let's talk about Watson what's up is

having an option corners select a

contact a send a message they also have

the option of attachment that is what is

I design I'm going to talk about low

level design if I click on attachment it

is having multiple options in it let us

say we having an option of selecting an

image video document.location files they

have multiple option to select so that

is furnished the only reason I'm talking

in depth that talking if if I'm talking

about any software that is talking about

the Gmail Gmail is having an option of

composing a me sent me outbox spam

logout learning that is for his high

level ISM now what is new level using

do a compose meant it will be having an

option contest to to human scent so that

will remind me lightly

BC BC subject body attachment send

button cancel button signature that is

for a strong liberal different I hope it

is very understandable right

so once the design phase is completed

the for stage in software development

lifecycle

say that coding coding has to be done

developer will start writing the code

while seeing the lower level design and

quite and I always remember business

analyst he is the bridge between the

customer and the developers so once

after the coding is done the first stage

of software development life cycle is

harnessed testing which we will be doing

it once the testing is done software is

working perfectly fine we are going to

reuse it that comes a six-page the sixth

stage is called as installation and

implementation our sighting genius site

ingenious fielding genius they will go

to the customers place install the

software make it ready so that customer

can start their running that business

with the help of the software that is

forest installation installation or

implementation yeah

coming to the seventh street that is

called as maintenance is the last page

of software development life cycle is

called as maintenance fees maintenance

is mainly done by developer and QA now

I'm going to tell you what do you mean

the maintenance phase once we have given

a Stockton to the customer there will be

service level agreement for six months

for one year that means while using the

software if customer is facing any

defect if customer is facing any problem

and you want to change it it will be

written in the service level agreement

that we will be providing our

maintenance to them for a period of six

months or one year so we will be

developing it developer will be

developing it test engineers retested

and we will give the new software to the

customer over a period of

how many bitter six on Somalia done once

after service level agreement is over if

customer wants to do any modification in

the software they have to pay and get it

so that is called a software development

lifecycle I hope it is very I have

explained in a very easy language if you

have any question please reach out to me

I have a my Jimmy rating the link

description my Cora profile in the link

description however my blog in

description and you have any questions

please reach out to me if you like this

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