Digital Transformation: Wholesale Market Management System
Client: Wholeseller
Overview
We transformed a complex pen-and-paper wholesale market operation into a fully digital ecosystem. This comprehensive solution addressed the inefficiencies of traditional manual processes in a high-pressure, fast-moving environment where precision directly impacts profitability.
The existing system
Wholesale markets for fresh produce manage substantial quantities from farmers and cooperatives, selling to vendors with complex documentation requirements including debt monitoring for recurring customers. The entire system operated on paper, compromising precision and resulting in frequent revenue losses.
Main Challenge
Digitize all processes, considering the environment: high-pressure, fast-moving, and physically demanding.
The process I led
+ Research
+ Task analysis
+ System architecture
+ Prototyping
+ Testing
+ Full UX design
+ Product development support
+ Continuous improvements
Research & Discovery: Task Analysis
Seller - on site sell
Identify the customer
Take the order
Physically collect ordered produce
Write items, amounts, and prices on slip
Send customer to cashier with slip
Teller - on site payment
Identify the customer
Receive payment or write up in customers book
Handwrite receipt
Device Placement Strategy
Initial Consideration: Handheld Device
We initially considered a pocket device that could replace the seller's phone for taking orders while moving around the warehouse.
Alternative: Weight Stand Attachment
Client suggested attaching the device to the weight stand, but field observation revealed this was often far from the seller's location.
Field Research Insights
Direct observation showed that with heavy loads, carrying any additional device was uncomfortable, and sellers moved constantly with weights on carriages.
Optimal Solution: Carriage-Mounted Tablet
Since sellers move throughout the market with their carriages, we identified carriage-mounted secure stands as the ideal solution. After researching the available options, we sourced and purchased specialized secure stands that could withstand the mobile nature of the market environment. Carriage-mounting the tablets kept them accessible and protected, while remaining detachable as needed.
System Architecture
The data schema and system analysis documents were crafted by the product manager and system analyst. Leveraging my ability to read technical documentation, including database schemas and system architecture diagrams, I reviewed these documents and provided design-informed feedback.
Through close collaboration with both Product and Development teams, we refined the system architecture to ensure optimal user experience integration. The development team then utilized these refined documents to construct the system, with ongoing cross-functional collaboration throughout the design and development phases.
The system’s components
Seller’s Tablet

Cashier’s Desktop

Management System

Accounting System
Seller's Tablet UX Prototype
Streamlined new customer creation
One-click buttons for common data entry
Tabbed navigation for existing customers
Real-time data entry and updates
Cashier's Desktop UX Prototype
Optimized for compact computer screens
Clear status indicators for all orders
Search by customer ID, time, and status
Seamless integration with seller orders
Testing
Iterative feedback through our partners at the market, allowed fast-paced design, test and redesign cycle. We conducted:
Usability testing in a controlled environment
Field testing at the warehouse during working hours
Final Seller's Tablet Design
Impact
Operational Efficiency
Reduced processing time
Lower manpower dependency
Client data became reliable and up-to-date
Accuracy Improvement
Reduced errors throughout the sell and accounting cycle
Client identification made easy and debt closely monitored
Business Growth
System licensing created new revenue opportunities
Positioned client as technology pioneer in wholesale markets
Recognition
Winner of IT Awards 2022 - People and Computers