How to efficiently pick and pack ecommerce orders as an online seller?

Any retailer today will definitely have online sales as one if not the only sales channel. With online sales comes picking and packing orders is a critical lever for profitability, customer satisfaction, and scalability. Picking and packing is the most labour-intensive part of fulfilling your online orders. Small changes in layout, process, and technology can yield massive gains. Here’s how to get it right.

1. Design a Pick-Friendly Warehouse Layout

Why it matters: In Kaizen continuous improvement, waste elimination is one of the keys to efficiency. Unnecessary movement or travelling are waste. Travel time, moving around, accounts for up to 70% of total picking time. A poorly designed layout is a silent killer of productivity.

What you can do:

• Adopt a U-shaped layout to have a single directional flow to streamline inbound and outbound flows.
• Clear separation of inbound and outbound products.
• Position fast moving inventory nearest to the packing stations to reduce walking time.
• Use top racks with slow moving stocks or packing material which are light such as bubble wrapping, empty cartons, polymailers etc.

2. Implement Smart Slotting Strategies

Why it matters: Strategic product placement reduces search time, minimizes picker fatigue and improves workplace safety.

What you can do:

• Sales movement analysis: Place fast moving items (high velocity) in the golden zone (waist to shoulder height). This is the tier 2 and 3 of a 4 tier shelving.
• Relation grouping: Place commonly bought-together items nearby so you can find them quickly.
• Monthly readjustment: Adjust storage locations based on past sales data and forecast by placing high sale items in the golden zone.

3. Choose the Right Picking Method

Why it matters: The wrong method can waste time, lower your throughput and inflate labour costs.

What you can do:

Experiment with the picking methods below. Record the time to pick 1 order and all the orders for the day.

What is Single Order Picking?

Picking one order by one order. Each order is completed before picking the next one.

What is Batch Picking?

Multiple orders are prepared ahead. Picker then travels through the warehouse picking multiple orders at the same time, usually with a trolley. Orders are picked in aggregate. For example, there are 5 orders with SKU A (10 units), SKU B (5 units) and SKU C (8 units). Picking tasks are grouped based on the similarity between the SKUs that need to be picked in order to fulfill different orders. The items are picked together (in batches), which reduces pickers’ movement. After picking all the items for various orders, picker then proceed to a packing area where they are sorted and assigned to the individual 10 orders to be shipped.

What is zone picking?

Zone picking starts by separating the warehouse into zones, usually by product SKU family. Each zone will have their own dedicated picking team. Pickers do not need to travel around the whole warehouse for picking. However, the orders combining step would require detail coordination to prevent wrong order packing.

 

What is wave picking?

Wave picking is a method where orders are grouped and organised in batches or “waves” to optimize warehouse fulfilment efficiency. 

You can think of it like batch picking with criteria imposed for each wave. Common criteria, are like product type, couriers (SPX, Singpost, uParcel), or delivery type (same day, next day, urgent orders, cross borders international orders etc).

 

Picking Method	Best suited for	Pros	Cons
Single Order Picking	Low volume, high SKU variability	Simple, intuitive and accurate. Fast implementation.	High travel time to move around, labour intensive.
Batch Picking	High order volume, small items	Reduces travel, efficient	Requires final sorting step.
Zone Picking	Large warehouses with many pickers	Multiple parallel picking, very scalable	Coordination required, may make mistake without a robust software
Wave Picking	Time-sensitive operations	Syncs with priority of order	Complex to manage

 

Leverage Technology for Accuracy & Speed

Why it matters: Manual errors are costly and slow. Manpower is difficult to find. Technology brings speed and accuracy.

Recommended Tools:

• Barcode scanners or QR readers: Reduce mis-picks and enable real-time tracking.
• Pick-to-light or voice picking: Visual cues for picking, less training required. Ideal for high volume, low mix environments.
• Warehouse Management System (WMS) or Inventory Management Systems: Automates task allocation, tracks productivity, and optimizes routes.

5. Train and Motivate Your Pickers

Why it matters: The best systems still rely on engaged human operators

Best Practices:

• Standardize SOPs and reinforce them with visual aids such as Pick to light.
• Incentive driven performance with leaderboards and missions.
• Cross-train staff to cross deploy staff for peak loads and reduce downtime.

6. Monitor KPIs and Continuously Improve

Why it matters: What gets measured gets improved.

Key Metrics:

• Pick rate, lines or items per hour
• Order accuracy rate
• Total time per pick
• Number of orders per person / hour

Use these metrics to identify bottlenecks, test improvements, and continuously iterate.

Pick yourself up

Picking is not just about speed. You need a combination of the strategies discussed based on your order type and throughput. By combining smart layout design, data-driven shelf positioning, the right picking method, and a motivated team supported by technology, you can build a fulfilment engine that scales up with your business.