Converting Chronic Operational Failure into Stable, Scalable Production
Delifresh Ltd | Scunthorpe, UK
Role: Engineering Manager
Sector: Food Manufacturing (Sandwich Fillings)
Project Type: Operational Reliability Transformation & Capacity Release
Operational Context
Delifresh operated a growing food manufacturing facility producing a wide range of sandwich fillings, packaged in various container shapes and sizes and labelled for multiple major chain retailers.
While product demand was increasing, the site was constrained by recurring daily engineering failures that limited throughput and reliability.
The production environment involved:
- Frequent washdowns
- Extensive pneumatic automation
- Mixed legacy electrical control systems
This combination was quietly undermining availability, consistency, and scalability.
Although machinery was fundamentally capable, systemic engineering weaknesses were suppressing output.
Systemic Engineering Issues Identified
The site was not experiencing isolated faults — it was experiencing repeat failure modes that had become normalised:
- Persistent malfunction of pneumatic valves, cylinders, and actuators
- Intermittent and unpredictable electrical control failures
- Ongoing product waste and unplanned stoppages on automated filling equipment
These issues resulted in:
- Daily downtime
- Reactive maintenance culture
- Lost production capacity
- Increasing operational strain
The underlying problems were structural rather than component-based.
Engineering Strategy
Rather than treating symptoms, I conducted a root-cause-led investigation across:
- Mechanical systems
- Pneumatic infrastructure
- Electrical control architecture
- Environmental operating conditions
- Operational procedures
The objective was not short-term recovery, but permanent elimination of failure mechanisms and restoration of engineering stability.
Technical Interventions
1. Pneumatic System Reliability
Recurring pneumatic failures were initially assumed to be component-level defects.
A holistic analysis of the compressed air system revealed moisture contamination within the air infrastructure as the true root cause.
Intervention included:
- System-level analysis rather than machine-level replacement
- Identification of moisture ingress sources
- Correction of air treatment deficiencies
- Establishing stable, dry compressed air supply under all operating conditions
Outcome:
Pneumatic-related downtime was eliminated permanently. Valves and actuators ceased failing, and the issue did not reoccur.
2. Electrical System Stability in Washdown Environments
Electrical failures were not random — they correlated directly with routine washdown procedures.
Investigation identified:
- Vulnerable control components exposed to moisture
- Insufficient environmental protection
- Predictable ingress points
Intervention included:
- Correlation of failure patterns with cleaning schedules
- Re-engineering electrical protection
- Strengthening system integrity to match operating conditions
Outcome:
Electrical malfunctions caused by washdown processes were eradicated completely, with no recurrence.
3. Automated Filling System Waste Elimination
The automated sandwich filling robot was operating without sufficient logical interlocks between container presence and product dispensing.
Control system review identified gaps in sequencing safeguards.
Intervention included:
- Modification of PLC control logic
- Making dispensing conditional on confirmed container presence
- Introducing verification safeguards to prevent empty dispensing cycles
Outcome:
Product waste was eliminated completely.
Clean-down time was reduced.
Unplanned stoppages linked to mis-dispensing were removed from daily operation.
Transformation of Engineering Function
Once systemic issues were resolved:
- Daily breakdown cycles ceased
- Engineering activity transitioned from reactive firefighting to structured preventative maintenance
- Machine availability increased without additional equipment
- Production output rose without increasing engineering headcount
No new machinery, staff, or capital investment was required to meet growing demand.
Capacity was released by removing hidden engineering constraints.
Business Impact
- Sustained increase in production capacity
- Improved reliability and predictability of output
- Reduced waste and maintenance intervention
- Engineering repositioned as a strategic enabler rather than an operational bottleneck
As demand continued to grow, Delifresh eventually outgrew the physical limits of the Scunthorpe site and relocated operations to its sister facility in Barnsley — driven by market demand rather than engineering limitations.
Key Capabilities Demonstrated
- System-level root cause analysis
- Pneumatic infrastructure reliability engineering
- Electrical system hardening for washdown environments
- PLC logic optimisation and safeguarding
- Waste elimination through control strategy redesign
- Transition from reactive maintenance to preventative structure
- Capacity unlocking without capital expenditure
- Engineering leadership aligned with commercial growth
Board-Level Summary
This project demonstrates how targeted engineering leadership can:
- Remove systemic operational risk
- Unlock latent capacity within existing assets
- Deliver long-term production stability
- Increase output without capital expenditure or additional staff
The outcome was not merely fault resolution, but a permanent shift in how the site operated — from instability and reactive maintenance to engineered reliability and scalable production, but a permanent shift in how the site operated.