How Sayurbox Achieved 40% Faster Picking and 69% Fewer Missing Items
Overview
By simplifying invoice matching and improving item visibility, the team cut average picking time by 40% and reduced missing item rates by 69%. This user-centered design effort not only met but exceeded goals for cost and error reduction.
Scope
Research, Design, Prototyping, Usability Testing
Industry
E-groceries, Warehouse
Business Objective
Reduce labor costs from 13,000 IDR/order to 11,000 IDR/order
To cut labor costs, workers are expected to complete more orders in less time. Initally the average for picking per order was 5 min/order.
Reduce missing items rate by 50%
The current monthly error rate is 5%, with a goal to reduce it to 2.5%. Errors include swapped items, incorrect weights, and wrong quantities.
Problem Statement
Pickers spend too much time matching invoices from the list in the mobile app.
The order number that needs to be matched with the physical invoice.
Repeat the process above.
Missing items are caused by picking errors like hard-to-find items, human error, and new pickers.
Because pickers and checkers were busy, we interviewed their team leader to learn about their pain points. Here’s what we found:
Ideation
Build separated section for invoice picking.
To avoid cognitive overload and help pickers stay focused on their tasks.
Display item locations on the mobile app.
Aiming to improve item accuracy and reduce human error.
Design Exploration
New section for invoice picking
Design 1. create a dedicated screen for invoice picking to enhance focus and speed during the picking process.
Design 2. Include the invoice list in the product picking screen.
Display Item Location
Design 1. Plain and clear information about location of the product.
Design 2. Using bold color to improve attention from users.
Let’s see the full flow before we test each design to our user at warehouse.
User Flow 1. This design offers a solution that helps users stay more focused when picking invoices but comes with a longer flow.
User Flow 2. This design has a shorter flow but may lead to users accidentally scrolling, which could disrupt their focus while picking invoices.
Testing
Testing User Flow 1
The picking process averages 3 minutes per order, down from the current 5 minutes.
I timed five pickers with varied experience and found the average picking time was 3 minutes per order.
Testing User Flow 2
Picking takes about 1 minute longer than User Flow 1.
The design is similar to Flow 1, but users accidentally clicked the close button, causing longer completion times in testing.
And for the item location indicator in both designs, there were no issues because all five testing participants understood it, resulting in a 100% success rate.
Impact
An increase in picking speed by 40%.
Before the design was implemented, the average picking time per order was 5 minutes; now, it is 3 minutes per order.
A decrease in the missing items rate by 69%.
For the missing items rate, a reduction of 69% was achieved, exceeding Sayurbox's target of a 50% decrease.
