Enhance Sales & Purchase Management System
Budget: $250 – $750 USD
Functional Requirements Specification Module: Sales and Purchase Management System
Sales Module
New Sale – Data Saving
1. Save sale record in the sales table when a new sale is made.
2. Save sale items in the sales_items table.
3. Save customer transaction in the customer_transactions table during the sale.
4. Save account transaction in the account_transactions table only if the customer
made a payment.
5. Save product movement in the product_transactions table.
Edit Sale – Data Update
1. Update sales record.
2. Update sales items.
3. Update customer transactions.
4. Update account transactions (if there was a payment).
5. Update product transactions.
6. Update units if affected by changes in product quantities.
Purchase Module
New Purchase – Data Saving
1. Save purchase record in the purchases table.
2. Save purchase items in the purchase_items table.
3. Save supplier transaction in the supplier_transactions table.
4. Save account transaction in the account_transactions table (if payment is made).
5. Save product movement in the product_transactions table.
6. Update unit cost and price, and calculate the new average cost using the previous
values.
Edit Purchase – Data Update
1. Update purchase record.
2. Update purchase items.
3. Update supplier transactions.
4. Update account transactions.
5. Update product transactions.
6. Recalculate and update unit cost and price based on previous and new values using
average cost formula.
Performance Requirement
• All the above processes must be optimized to work smoothly even if the internet connection is slow.
• Use local caching, asynchronous processing, or background sync methods where possible to enhance performance under poor network conditions.
System Improvement Requirements for Sales and Purchase Management System
Objective:
Ensure the reliability and integrity of all data-saving operations within the Sales and Purchase modules, particularly under slow or unstable internet conditions.
Issue Summary:
● When the internet connection is slow, data is partially saved or lost in the database.
● Some critical tables such as sales_items, product_transactions,
account_transactions, etc., do not receive records properly.
● This causes inconsistencies in inventory, reporting, and financial tracking.
Functional Reliability Requirements: Transaction Atomicity
● Ensure all related insert/update operations (e.g., sales, sales_items, transactions) are executed as a single transaction block.
● If any operation fails, all changes should roll back automatically to avoid partial saves.
Offline Data Handling
● Implement a local storage mechanism (e.g., IndexedDB for web apps or SQLite/local file for desktop/mobile) to temporarily store records when the internet is unavailable or slow.
● Sync the data in the background once the internet is restored.
Sales Module
New Sale – Data Saving
1. Save sale record in the sales table when a new sale is made.
2. Save sale items in the sales_items table.
3. Save customer transaction in the customer_transactions table during the sale.
4. Save account transaction in the account_transactions table only if the customer
made a payment.
5. Save product movement in the product_transactions table.
Edit Sale – Data Update
1. Update sales record.
2. Update sales items.
3. Update customer transactions.
4. Update account transactions (if there was a payment).
5. Update product transactions.
6. Update units if affected by changes in product quantities.
Purchase Module
New Purchase – Data Saving
1. Save purchase record in the purchases table.
2. Save purchase items in the purchase_items table.
3. Save supplier transaction in the supplier_transactions table.
4. Save account transaction in the account_transactions table (if payment is made).
5. Save product movement in the product_transactions table.
6. Update unit cost and price, and calculate the new average cost using the previous
values.
Edit Purchase – Data Update
1. Update purchase record.
2. Update purchase items.
3. Update supplier transactions.
4. Update account transactions.
5. Update product transactions.
6. Recalculate and update unit cost and price based on previous and new values using
average cost formula.
Performance Requirement
• All the above processes must be optimized to work smoothly even if the internet connection is slow.
• Use local caching, asynchronous processing, or background sync methods where possible to enhance performance under poor network conditions.
System Improvement Requirements for Sales and Purchase Management System
Objective:
Ensure the reliability and integrity of all data-saving operations within the Sales and Purchase modules, particularly under slow or unstable internet conditions.
Issue Summary:
● When the internet connection is slow, data is partially saved or lost in the database.
● Some critical tables such as sales_items, product_transactions,
account_transactions, etc., do not receive records properly.
● This causes inconsistencies in inventory, reporting, and financial tracking.
Functional Reliability Requirements: Transaction Atomicity
● Ensure all related insert/update operations (e.g., sales, sales_items, transactions) are executed as a single transaction block.
● If any operation fails, all changes should roll back automatically to avoid partial saves.
Offline Data Handling
● Implement a local storage mechanism (e.g., IndexedDB for web apps or SQLite/local file for desktop/mobile) to temporarily store records when the internet is unavailable or slow.
● Sync the data in the background once the internet is restored.