10 Things to Define Before Starting Custom Application Development

A custom application should begin with a clear business problem or business need, rather than a predefined list of features. Understanding why the application is required helps determine what should actually be built.

Identify the Business Problem

Start by identifying what the business is trying to improve. The problem could involve manual processes, operational delays, disconnected systems, poor visibility, repetitive work, or difficulty managing growth.

For example, a company may use spreadsheets and emails to manage customer requests. The real problem may be the lack of centralized information, approval visibility, and timely communication.

Understand the Current Workflow

Before designing a new application, understand how the business process works today. Look at the major steps, people involved, approvals, information exchanged, and systems currently being used.

For example:

Request → Review → Approval → Processing → Notification → Reporting.

Mapping the current workflow gives the development team a practical starting point.

Business Goals and Expected Outcomes

The application should have a clear connection to the business goals it is expected to support. These goals help everyone understand what the application should improve and how its value can be measured after implementation.

Business outcomes may include:

Reducing processing time
Lowering manual effort
Improving data accuracy
Increasing operational visibility
Improving customer or employee experience
Supporting business growth
Automating repetitive activities

Where possible, connect outcomes to measurable results. Reducing an approval process from three days to one day provides a clearer measure of success than simply saying the application should improve efficiency.

Users and Usage Scenarios

The people who use the application should influence its features, interface, access controls, and technology requirements. Understanding users early can prevent the application from being designed around assumptions.

Types of Users

Identify the different groups that will interact with the application, such as employees, managers, administrators, customers, partners, operations teams, or leadership. Different user types may require different features and levels of access.

Number of Users and Expected Growth

The expected number of users can influence application architecture, infrastructure, performance, and scalability. An internal application used by 50 employees may have very different requirements from a customer-facing application expected to support thousands of users.

Devices and Platforms

Consider whether users will access the application through desktop computers, laptops, tablets, smartphones, or a combination. Field employees, for example, may require a mobile-friendly experience.

Required Features and Use Cases

Once the business problem and users are understood, identify what the application needs to actually do.

Core Features

Focus first on features directly connected to the application’s primary purpose, such as dashboards, forms, approvals, notifications, reports, document management, payments, or workflow automation.

The objective is not to add every possible feature. Core features should directly support identified business problems and user needs.

User Actions and Use Cases

Describe important user actions and what happens after each action.

Example:

Request → Review → Approval → Updates Status → Receive Notification

Must-Have and Future Features

Separate requirements into must-have capabilities for the initial application and useful enhancements that can be considered later. This keeps the initial scope manageable while allowing room for growth.

Data, Integration and System Requirements

Business applications rarely work in isolation. They may need information from existing systems, communicate with third-party services, or provide data to other applications.

Data Requirements

Identify what information the application will create, receive, store, process, and display. Consider where it currently exists, who needs access, and whether existing data needs to be migrated.

Existing Systems and Third-Party Integrations

Identify systems and services the application needs to connect with, such as ERP, CRM, HR systems, payment gateways, cloud services, email platforms, and external business applications.

These integrations should be understood early because they can influence architecture, development effort, testing, timeline, and cost.

Data Import, Export and Reporting

Consider how information will move in and out of the application. Users may need to import existing information, export data to spreadsheets, generate reports, or connect application data with analytics platforms.

Security and Access Control

Security requirements should be considered according to the business, users, and type of information handled by the application. A customer portal, internal HR application, and financial application may require different security controls.

User Roles and Permissions

Define what different users can view, create, edit, approve, or manage. Example: Administrator → Full system access; Manager → Team-level access; Employee → Own records and assigned activities.

Authentication and Access Control

Depending on the application, authentication may involve username and password, single sign-on, multi-factor authentication, role-based access, and session management.

Data Protection and Integration Security

Sensitive information needs protection within the application and while it moves between connected systems. Security may involve encryption, secure APIs, access controls, audit logs, and secure infrastructure.

Technology and Development Approach

Technology should follow the business and application requirements, rather than becoming the starting point for the project.

Application Architecture

The architecture should support functionality, integrations, security, performance, and expected growth. A typical business application may involve: Frontend → Backend/API → Database → External Systems. AWS highlights scalability, reliability, security, performance, and modularity as important considerations when designing applications for growth.

https://azure.microsoft.com/en-us/blog/azure-application-architecture-guide/?utm_source=chatgpt.com

Technology Stack

Technology selection may include programming languages, frameworks, databases, cloud platforms, APIs, and development tools. The right technology is not necessarily the newest or most popular option; it should fit the application’s requirements and be practical to maintain.

Web, Mobile and Cross-Platform Requirements

Decide whether the application requires a web application, native mobile application, cross-platform mobile application, or a combination. Consider users, devices, functionality, performance, development effort, and future requirements.

Agile and Iterative Development

Requirements often become clearer when users see working software. An Agile or iterative approach allows teams to deliver smaller increments, gather feedback, and adjust priorities as development progresses.

Delivery Expectations

Clear expectations around scope, budget, and timeline help the business and development team work toward the same outcome.

Initial Scope

Establish what will be included in the initial release. A defined scope makes it easier to estimate development effort and understand what is included in delivery.

Budget

The project budget should consider more than development effort, including cloud infrastructure, third-party services, software licenses, integrations, testing, deployment, and support or maintenance.

Development Timeline and Milestones

Establish major stages and expected milestones: Planning → Design → Development → Testing → Deployment. Account for integrations, feedback, testing, and dependencies.

Ownership, Handover and Long-Term Responsibilities

If an external development partner is involved, ownership and handover expectations should be clear before development begins.

Application and Source Code

Clarify ownership and access to the application, source code, repositories, and other development assets.

Documentation and Knowledge Transfer

The handover should provide the information required to understand and operate the application, including technical documentation, architecture information, deployment information, and knowledge-transfer sessions.

Infrastructure, Accounts and Access

Clarify ownership and access for cloud accounts, hosting, databases, repositories, domains, certificates, and third-party services.

Support and Maintenance

Agree on what happens after go-live, including bug fixing, technical support, monitoring, security updates, application upgrades, and future feature development.

How the Application Will Evolve

A custom application should be considered beyond its initial launch. Business processes, user expectations, technology, and operational requirements can change over time.

Future Business Growth

Consider whether the application may eventually need to support more users, locations, transactions, products, or business processes.

Application Scalability

The application should accommodate expected growth without requiring a complete rebuild. Scalability can involve application architecture, database design, infrastructure, and cloud resources.

Upgrades and New Requirements

New business requirements often emerge after users begin working with the application. Planning for change can make it easier to introduce new capabilities without disrupting existing operations.

Maintenance and Modernization

Technology, security standards, infrastructure, and integrations can change over time. Regular maintenance and modernization can help keep the application secure, reliable, compatible, and useful to the business.

Final Checklist Before Starting Custom Application Development

Before starting the project, make sure the business can answer these questions:

What business problem are we trying to solve?
What business outcome do we expect?
Who will use the application?
How will they use it?
What does the current workflow look like?
What functionality is actually required?
What technology and integrations will be needed?
What security and access requirements apply?
What budget and timeline are realistic?
How will success be measured?
Who will own and maintain the application after launch?

The clearer these answers are, the easier it becomes to plan the application and communicate expectations with the development team.

Key Takeaways

Custom application development should begin with the business requirement, not the technology.

A successful application should:

Solve a clearly defined business problem.
Support the actual users and their workflows.
Use technology appropriate to the business requirements.
Protect business data and manage user access.
Be tested before going live.
Have clear ownership and handover arrangements.
Be capable of evolving as business requirements change.

The objective is not simply to develop software. It is to develop a solution that continues to provide measurable value to the business.

FAQ

What should I define before starting custom application development?

The key areas include the business problem, goals, users, workflows, features, data, integrations, security, technology, budget, timeline, ownership, and long-term maintenance requirements.

Should features be defined before the business problem?

No. The business problem should come first. Features should be identified based on what is required to solve the problem and achieve the desired outcome.

How do I choose the right technology stack for a custom application?

Technology should be selected based on the application’s business requirements, users, devices, integrations, security, performance, scalability, and long-term maintenance needs.

Why are user scenarios important?

User scenarios explain how people will actually use the application. They help identify workflows, actions, approvals, permissions, and opportunities for automation.

Should future requirements be considered before development?

Yes. Future features do not necessarily need to be included in the first release, but expected growth and changes should be considered when planning architecture and technology.

What should be discussed with a custom application development company?

Discuss the business problem, users, requirements, scope, integrations, security, technology approach, budget, timeline, ownership, handover, and post-launch support.

Sources

AWS — Architecting for Reliable Scalability — https://aws.amazon.com/blogs/architecture/architecting-for-reliable-scalability/
IBM — What Is Application Modernization? https://www.ibm.com/think/topics/application-modernization?utm_source=chatgpt.com
Atlassian — Agile Software Development for Developers — https://www.atlassian.com/agile/software-development/