How to Handle Rising Parcel Volume Without Adding Headcount
Quick Answer: Rising parcel volume does not have to mean a matching increase in warehouse headcount. Automated induction, scanning, sortation and warehouse control can remove repetitive manual handling, increase throughput and reduce the cost-per-parcel burden created by labour-intensive processes.
Rising Parcel Volume: The Headcount Problem Starts With Throughput
Warehouse labour is often treated as the easiest way to increase capacity. More parcels arrive. More people are scheduled. The operation processes more parcels.
Until it doesn’t.
Labour availability, recruitment, training, absence, shift coverage and peak-season demand all create constraints.
The more important question is: How many parcels can each part of the operation process per hour?
That shifts the conversation from headcount to throughput. Emerdis’ current automation guidance positions automated sortation as a way to increase throughput while avoiding the need to expand the physical warehouse footprint.
Identify the Bottleneck Before Adding Labour
Adding workers to a process that is already constrained by equipment or layout does not necessarily increase throughput.
Start by measuring:
Parcels per hour
Parcels per labour hour
Induction rate
Scan read rate
Sortation rate
Mis-sort rate
Manual touches per parcel
Peak hourly volume
Cost per parcel
Then identify the node limiting the entire operation. For example:
The goal is not to automate every process. It is to remove the constraint that is preventing the operation from processing the next parcel.
Increase Throughput at Induction
Induction is often the first physical bottleneck.
If parcels enter the automation system too slowly, downstream sortation capacity cannot be fully utilised.
High-speed induction systems can use:
Graduated speed control
Automated singulation
Controlled spacing
Conveyor metering
Barcode capture
Modern induction systems can process 10,000+ parcels per hour in suitable high-volume applications. That does not mean every warehouse needs a 10,000-parcel-per-hour induction system.
It means the induction rate needs to be specified against the actual peak requirement.
Automate the Repetitive Routing Decisions
Manual sorting creates another constraint.
An operator has to:
Identify the parcel.
Read the destination.
Determine the correct lane.
Move the parcel.
Repeat.
At low volume, this can work. At high volume, every additional manual touch adds labour demand and introduces another opportunity for error.
Automated parcel sortation moves the routing decision into the control system. The parcel is identified. The destination is determined.
The WCS coordinates the equipment. The parcel is diverted.
Emerdis’ automated parcel sorting solutions have seen throughput improvements of up to 6x in well-integrated deployments, alongside reductions in cost per parcel. Actual performance depends on the system design, parcel profile and operating conditions.
Use Automation to Reduce Manual Touches
The strongest automation business cases do not simply count how many workers a machine replaces. They measure how many manual touches disappear.
Consider a parcel that is:
Picked manually
Moved to a sortation area
Scanned manually
Sorted manually
Consolidated manually
Moved to dispatch
Every touch consumes labour. Every hand-off creates an opportunity for delay or error.
A well-designed automation stack can connect multiple nodes into a continuous process.
That is where throughput gains become measurable.
Use DWS to Capture Parcel Data Automatically
Dimensioning, weighing and scanning can also reduce manual data-entry requirements.
A DWS system can capture:
Dimensions
Weight
Barcode information
Parcel identification data
The result is a digital record generated as the parcel moves through the operation. This matters for both operational efficiency and revenue protection.
Manual measurement takes time.
Manual entry creates errors. Automated capture removes both from the critical path.
Choosing a DWS system? See our guide to how to choose the right DWS system.
Use WCS to Coordinate the Automation Stack
Automation equipment does not automatically create an efficient warehouse.
The control layer matters. A WCS can coordinate the movement of parcels across equipment and provide visibility into the operation.
This becomes increasingly important as the number of automated nodes increases.
For example:
Scan → Identify → Route → Sort → Dispatch
Each node needs to communicate with the next. A control system helps ensure the physical process keeps pace with the warehouse instructions.
Measure the Cost Per Parcel
The most useful KPI is often not total labour cost. It is cost per parcel.
Calculate:
Then compare the current operation against the proposed automated process. Include:
Direct labour
Overtime
Temporary labour
Rework
Mis-sorts
Returns
SLA penalties
Manual data entry
Equipment utilisation
This creates a business case that finance can understand.
Manual sorting costs range from roughly £0.18–£0.24 per parcel. Compare that to £0.08 or below at scale in the automated parcel sortation deployments from Emerdis.
The Goal Is Not Zero Labour
Automation does not mean eliminating people from the warehouse. It means using people where human judgement adds value.
Operators can move away from repetitive sorting and data-entry tasks towards:
Exception handling
Quality control
Maintenance
Customer-specific requirements
Workflow supervision
Process optimisation
That distinction matters. The best automation deployments are operator-led.
A Practical 5-Step Approach
Measure: Establish current parcels/hour, labour hours, errors and cost per parcel.
Find: Identify the physical bottleneck limiting throughput.
Automate: Target the bottleneck rather than automating everything.
Integrate: Connect WMS, WCS, scanning, DWS and sortation where required.
Report: Track throughput, accuracy, labour hours and cost per parcel after deployment.
Frequently Asked Questions
How can a warehouse process more parcels without adding workers?
Automate the repetitive handling steps that scale with headcount: induction, scanning, sortation and DWS, coordinated by a warehouse control system. Emerdis sortation processes up to 20,000 parcels per hour at 99.9% accuracy, so throughput rises without a matching rise in labour. Start by identifying your process constraint.
Does warehouse automation replace warehouse workers?
No. Automation removes repetitive handling and lets operators focus on exception management, quality, maintenance and higher-value activities, with experienced operators still leading the process.
What should I measure before automating parcel handling?
Measure parcels per hour, labour hours, manual touches, mis-sort rate, scan accuracy, peak volume and cost per parcel. These figures establish the baseline against which automation ROI can be measured.
Can automation increase throughput without expanding warehouse space?
Yes. Modular robotic sortation using Autonomous Mobile Robots removes congestion and maximises every square metre, while automated sortation, induction and control systems add throughput within your existing footprint. Modular systems such as DWS and Pick to Light can be installed in a day, with full ROI in 3–6 months
Ready to Process More Parcels Without More Headcount?
Emerdis can assess the bottlenecks limiting your current parcel throughput and identify where automation can deliver measurable capacity gains.
The content on this website is for general informational purposes only and does not constitute formal engineering, financial, or professional advice. Figures, case studies, and metrics are illustrative estimates based on specific projects; actual results will vary depending on your unique infrastructure and operational variables. Emerdis accepts no liability for any loss or damage arising from reliance on this information. For advice tailored to your specific facility, please contact sales@emerdis.com for a formal assessment.
