CNC Machining Precision for Beauty Devices

Understanding CNC Machining Tolerance Standards for Beauty Devices

When manufacturing beauty devices on Alibaba.com, understanding CNC machining tolerance standards is critical for balancing quality, cost, and market expectations. Tolerance refers to the permissible variation in a part's dimensions—tighter tolerances mean higher precision but also exponentially higher costs.

For beauty device manufacturers, especially those producing facial cleansing brushes, HIFU devices, and other precision equipment, the industry has established several tolerance bands that serve as practical benchmarks for different application scenarios.

CNC Machining Tolerance Standards: Cost vs. Precision Comparison

Tolerance Level	Typical Range	Cost Multiplier	Best For	Quality Requirements
Standard	±0.05mm to ±0.13mm	1.0x (baseline)	Non-critical housings, cosmetic parts	ISO 9001, basic inspection
Precision	±0.01mm to ±0.02mm	3.0-5.0x	HIFU transducer mounts, motor housings, critical assemblies	ISO 13485, CMM inspection, full traceability
Advanced	±0.0025mm to ±0.005mm	8.0-12.0x	Medical-grade components, ultra-precision bearings	ISO 13485, clean room production, AS9100D
Ultra-Precision	±0.001mm or better	15.0-25.0x	Research equipment, specialized medical implants	ISO 13485, sub-micron CMM, full PPAP documentation

Data sourced from U-Need PM 2026 CNC Precision Guide and Modus Advanced tolerance specifications. Cost multipliers are relative to standard ±0.05mm baseline.

The table above reveals a critical insight: precision costs escalate exponentially, not linearly. Moving from ±0.05mm to ±0.01mm triples to quintuples your costs, while pushing to ±0.001mm can increase costs 15-25 times. This is why the 'mixed tolerance' approach—applying tight tolerances only to critical features while using standard tolerances elsewhere—has become the industry best practice.

According to industry analysis, a well-designed mixed tolerance strategy can save 30-40% on machining costs without compromising device performance ^[1]. For example, a HIFU device might require ±0.01mm tolerance on the transducer mounting surface (where ultrasound energy must be precisely focused) but only ±0.05mm on the outer housing (which serves primarily cosmetic and protective functions).

HIFU Device Market Growth: USD 1.82 billion (2025) → USD 4.67 billion (2034), CAGR 11.1%. Asia-Pacific accounts for 38.4% of global market share, with fixed devices (58.3%) outpacing portable units (41.7%) ^[8].

Surface finish requirements also vary by application. For beauty device components:

Milling/turning: Ra 3.2-1.6μm (typical production)
Grinding: Ra 3.2-0.8μm (precision applications)
Polishing: Ra 0.8-0.4μm (cosmetic surfaces, patient-contact areas)

These surface roughness values directly impact both aesthetics and functionality. A facial cleansing brush head, for instance, requires smoother surfaces (Ra 0.8-1.6μm) where it contacts skin, while internal motor housings can tolerate rougher finishes (Ra 3.2μm).

Quality Control Processes: What Buyers Really Expect

Quality control is where many beauty device suppliers on Alibaba.com fall short. While ISO certification is often marketed as a quality guarantee, experienced buyers understand that certification confirms a documented system exists—it doesn't guarantee every product is perfect.

As one Reddit user in the ISO consultants community noted:

Reddit User• r/PacificCertifications

just because you're ISO 9001 certified doesn't mean your quality is world-class. What it actually means is that you have a structured management system in place. Those are two very different things. ISO 9001 is basically a blueprint for managing quality. It pushes you to write things down, track your metrics, deal with problems when they pop up, and review how things are going. But here's what it doesn't do—it doesn't guarantee you're exceptional at what you do ^[2].

ISO 9001 quality discussion, 4 comments, 4 upvotes

This distinction is crucial for Southeast Asian exporters selling on Alibaba.com. Buyers aren't just looking for certificates—they want evidence of disciplined execution. Here's what sophisticated buyers actually expect:

Documentation Requirements:

First Article Inspections (FAIs) with dimensional reports
Certificate of Conformance (CoC) for each batch
Material certifications with heat lot numbers
Production Process Control Plans (PPAP for automotive-grade suppliers)
CMM measurement reports for critical features

Process Controls:

Statistical Process Control (SPC) charts showing capability indices (Cp/Cpk)
In-process inspection records at defined checkpoints
Non-conformance tracking and corrective action logs
Calibration certificates for all measurement equipment

For medical-grade beauty devices (HIFU, microcurrent, laser-based), ISO 13485 certification becomes mandatory, not optional. This standard adds requirements for:

Risk management per ISO 14971
Sterilization validation (if applicable)
Biocompatibility testing per ISO 10993
Post-market surveillance and complaint handling
Full traceability from raw material to finished product

ISO certification confirms that a business has a documented, structured system in place. It means processes are defined, responsibilities are clear, and the organisation is committed to continual improvement. What it does not do is certify that every product is perfect or that every service will exceed expectations. Think of it this way. A certified restaurant follows food safety procedures consistently. That does not mean every dish will be the best you have ever tasted. But it does mean the kitchen operates to a reliable standard every single time ^[2].

The restaurant analogy is particularly apt. ISO certification is like a health inspection pass—it confirms basic standards are met, but doesn't guarantee Michelin-star quality. For beauty device manufacturers on Alibaba.com, the real differentiator is consistent execution backed by transparent documentation.

Alibaba.com data shows that suppliers who provide comprehensive quality documentation (FAI reports, material certs, CMM data) receive significantly more qualified inquiries than those who only share ISO certificates. This suggests that sophisticated B2B buyers value evidence over credentials.

Material Selection: Impact on Precision and Cost

Material choice significantly impacts both achievable tolerances and machining costs. For beauty devices, common materials include:

Aluminum Alloys (6061, 7075):

Machinability: High (excellent chip formation, low tool wear)
Typical tolerance: ±0.01-0.02mm (precision), ±0.005mm (advanced)
Cost: Low to moderate
Applications: Housings, heat sinks, structural frames
Surface finish: Ra 1.6-3.2μm as-machined, Ra 0.4-0.8μm with polishing

Stainless Steel (304, 316L, 316LVM):

Machinability: Moderate (work hardening, higher tool wear)
Typical tolerance: ±0.01-0.025mm (precision), ±0.008mm (advanced)
Cost: Moderate to high
Applications: Medical-grade components, corrosion-resistant parts
Surface finish: Ra 1.6-3.2μm as-machined
Special note: 316LVM (vacuum melted) required for implantable or long-term skin contact

Titanium (Ti-6Al-4V, Grade 2):

Machinability: Low (galling tendency, poor thermal conductivity)
Typical tolerance: ±0.02-0.05mm (precision), ±0.01mm (advanced with specialized tooling)
Cost: High
Applications: Premium device housings, biocompatible components
Surface finish: Ra 1.6-3.2μm as-machined

Engineering Plastics (PEEK, PTFE, Delrin):

Machinability: Moderate to high (depends on specific polymer)
Typical tolerance: ±0.05-0.1mm (standard), ±0.02mm (precision)
Cost: Moderate (PEEK is expensive)
Applications: Insulators, wear components, non-conductive parts
Special consideration: Thermal expansion coefficients 5-10x higher than metals

Material Machinability Matrix for Beauty Device Components

Material	Machinability Rating	Typical Tolerance	Relative Cost	Best Applications
Aluminum 6061	High (90-100%)	±0.01-0.02mm	1.0x (baseline)	Housings, frames, heat sinks
Aluminum 7075	High (85-95%)	±0.01-0.02mm	1.2x	High-strength structural parts
Stainless 304	Moderate (50-60%)	±0.01-0.025mm	1.8x	General corrosion resistance
Stainless 316LVM	Moderate (45-55%)	±0.01-0.025mm	2.5x	Medical-grade, skin contact
Titanium Grade 2	Low (30-40%)	±0.02-0.05mm	3.5x	Premium biocompatible parts
Titanium Ti-6Al-4V	Low (25-35%)	±0.02-0.05mm	4.0x	High-strength medical components
PEEK	Moderate (60-70%)	±0.02-0.05mm	2.0x	Insulators, wear components
Delrin (POM)	High (80-90%)	±0.05-0.1mm	0.8x	Gears, bearings, low-friction parts

Machinability ratings based on tool life and material removal rates. Relative cost includes material cost and machining time. Data from U-Need PM and Modus Advanced material guides ^[1]^[4].

The material selection decision should balance performance requirements, cost constraints, and regulatory compliance. For instance:

A budget facial cleansing brush might use Aluminum 6061 for the motor housing (good enough performance, low cost) and Delrin for internal gears (excellent wear resistance, low friction).
A premium HIFU device would likely use Stainless 316LVM for transducer components (biocompatibility, corrosion resistance) and Titanium for the outer housing (premium feel, durability).
A portable microcurrent device might combine PEEK insulators (electrical isolation) with Aluminum 7075 structural frames (high strength-to-weight ratio).

For Southeast Asian exporters selling on Alibaba.com, offering material options at different price points can help capture a broader buyer base. Many buyers appreciate suppliers who can explain trade-offs clearly: 'If you need medical-grade certification, we recommend 316LVM. If this is for consumer-grade devices, 304 stainless provides adequate performance at 40% lower cost.'

Supplier Selection: What Alibaba.com Buyers Really Look For

Selecting the right CNC machining supplier on Alibaba.com is one of the most critical decisions for beauty device manufacturers. Based on Reddit discussions among procurement professionals and beauty device entrepreneurs, here are the key criteria that experienced buyers prioritize:

1. Verify ISO Certification Authenticity

Don't just accept a certificate number—ask for the actual audit report. As one Reddit user advised:

Reddit User• r/procurement

5 Mistakes to Avoid When Choosing a Chinese CNC Supplier: verify ISO 9001 audit reports, confirm small-batch capability, check on-time delivery track record, prioritize full traceability docs, prefer in-house manufacturing over trading companies ^[3].

Procurement discussion on Chinese CNC supplier selection, 7 upvotes

The distinction between in-house manufacturing and trading companies is particularly important. Trading companies often outsource production to multiple factories, making quality control and traceability challenging. In-house manufacturers have direct control over processes, equipment, and quality systems.

2. Assess Small-Batch Capability

Many beauty device startups on Alibaba.com begin with small orders (50-500 units). Suppliers who can handle small batches efficiently—without charging prohibitive setup fees—are highly valued. One cosmetics science Reddit user shared:

'Trial runs are pricey, my lab will do them, but they have to fit into a busy schedule. If you need less than 200 kg in a batch you are looking at $4 to $12 per unit. Good pricing usually kicks in around batch sizes from half a ton to two tons' ^[9].

For reference, 1 ton of 8oz beauty device components equals approximately 4,200 units. This means small-batch pricing (under 200kg) can be 2-3x higher than volume pricing.

3. Demand Full Traceability Documentation

Sophisticated buyers expect complete documentation chains:

Reddit User• r/Esthetics

I have not ordered esthetics things from Alibaba but as an artist who has ordered at least 20k in product from Alibaba from various vendors for Keychains, pins, dolls, and various other supplies, the best thing you can do is ask for video, get written features into your purchase contract, get proof of all the testing/safety compliance certificates. Ask about the warranty, what it covers, how it pays out. You can see on the vendor profile how many sales they've participated in and see their ratings. Look to see if they're alibaba certified and in they have a base in the USA. Pay through something you trust, like PayPal which is notorious for siding with the client if someone is trying to scam or delivers something wrong ^[5].

Alibaba vendors discussion for esthetics products, 6 upvotes

This advice extends beyond esthetics—it applies to all beauty device categories on Alibaba.com. Key documentation to request:

Material certificates with heat lot numbers (traceable to mill)
Dimensional inspection reports (CMM data for critical features)
First Article Inspection (FAI) per AS9102 or equivalent
Production process control plans showing inspection checkpoints
Warranty terms in writing (coverage, duration, claim process)
Compliance certificates (CE, FDA, RoHS, REACH as applicable)

4. Evaluate Communication Quality

Communication challenges with Chinese suppliers are well-documented. One Reddit thread highlighted:

Reddit User• r/hobbycnc

Chinese manufacturing supplier trust issues: communication hard translation issues, questions answered selectively, IP theft concern split parts among manufacturers ^[6].

Chinese manufacturing supplier discussion, 12 upvotes

To mitigate these risks, consider:

Using suppliers with English-speaking sales engineers (not just translators)
Requesting video calls to discuss technical details
Starting with small trial orders before committing to large volumes
Using Alibaba.com Trade Assurance for payment protection
Splitting complex assemblies among multiple suppliers to protect IP (if concerned)

5. Check Quick-Turn Capabilities

For prototyping and urgent production needs, quick-turn services are valuable. One engineer shared:

'RapidDirect 5 days production 3-5 days shipping' but warned 'Risk with Complex Features: You are effectively playing Shop Roulette. The algorithm assigns your job to whoever has capacity, not necessarily whoever has the specific 5-axis capability. You rarely get to talk to the actual machinist to clarify GD&T. For complex quick-turn, you are better off going Direct to a vetted shop where you can talk to the engineer' ^[7].

This highlights an important trade-off: aggregator platforms (RapidDirect, Xometry, PCBWay) offer fast quotes and delivery but may lack direct engineer communication. Direct suppliers offer better technical collaboration but may have longer lead times.

Real Market Feedback: What Beauty Device Buyers Are Saying

Understanding real buyer experiences provides invaluable context for CNC machining decisions. Here's what beauty device buyers and users are actually saying on Reddit and other forums:

HIFU Device Effectiveness: Mixed Reviews

HIFU (High-Intensity Focused Ultrasound) devices represent one of the fastest-growing segments in beauty devices, but user experiences vary widely:

Reddit User• r/SkincareAddiction

Hi, im 43yo. have done HIFU about 18 months in Singapore but i paid more than $300 for the treatment. almost 3x more. treatment is from the neck up and focus o the jawline contouring and lifting! it was painful, process took about 45mins but doc gave me some medication prior. honestly, it was an amazing result. i can feel all my loose skin around my upper neck became tighter and my jawline looked much sharper, face overall has lift effect.. very. noticeable result in a week or two. no down time. and plenty of compliments from friends ^[10].

HIFU facelift review discussion, 6 upvotes

Reddit User• r/SkincareAddiction

10% improvement that faded after a few months ^[10].

HIFU facelift review discussion, contrasting experience, 6 upvotes

These contrasting experiences highlight why precision manufacturing matters for HIFU devices. The transducer assembly must maintain exact tolerances (±0.01mm or better) to focus ultrasound energy correctly. Poor machining quality can result in inconsistent energy delivery, leading to the '10% improvement' experience rather than the 'amazing result' outcome.

Facial Cleansing Brushes: User Experience Insights

For facial cleansing brushes, user feedback reveals important design considerations:

Reddit User• r/ProductQuery

I've got pretty reactive skin and a cleansing brush actually worked for me as long as I was gentle. I only use it a couple times a week, lowest setting, and never press hard. It helps my cleanser work better without scrubbing. Daily use was too much, but occasional use made my skin feel cleaner, not irritated ^[12].

Facial cleansing brush for sensitive skin discussion, 1 upvote

Reddit User• r/ProductQuery

I tried one of those brushes thinking it'd fix my skin but it kinda just made it more irritated when I used it too often. Felt cleaner at first, but honestly gentle washing with hands + not overdoing it worked better long term ^[12].

Deep cleaning effectiveness discussion, 2 upvotes

These user insights have direct implications for CNC machining specifications:

Brush head mounting: Must allow for gentle, consistent pressure application (tolerance affects feel)
Motor housing: Should minimize vibration transmission (precision balancing required)
Waterproof seals: Critical for device longevity (surface finish affects seal integrity)
Battery compartment: Must maintain waterproof integrity over thousands of charge cycles (dimensional stability essential)

Alibaba Sourcing Experiences: Red Light Therapy Panels

One particularly insightful Reddit discussion about sourcing red light therapy panels from Alibaba revealed important truths about China manufacturing:

Reddit User• r/redlighttherapy

Almost ALL electronics that you buy from reputable brands is made in China - the exact same ones you can find on Ali from exactly this manufacturer, just rebranded. USUALLY if you buy from ali they should cost less than getting essentially the same from a vendor/reseller here, BUT consider that shipping cost and import duties often need to be added when buying from China, including possible hassles if you need to return an item ^[11].

Alibaba red light therapy panel effectiveness discussion, 11 upvotes

Reddit User• r/redlighttherapy

All made in Chinese factories, things you get from local companies are support, warranty and fast shipping ^[11].

Alibaba vs local supplier discussion, 11 upvotes

This is a crucial insight for Southeast Asian exporters on Alibaba.com: You're not competing on 'made in China' vs 'made elsewhere'—you're competing on value-added services. What buyers pay premium prices for locally isn't the product itself (which is often identical), but:

Responsive customer support
Hassle-free warranty claims
Fast shipping and easy returns
Technical assistance and training
Regulatory compliance documentation

For CNC machining suppliers on Alibaba.com, this means differentiating through service quality and documentation completeness, not just price. A supplier who provides comprehensive FAI reports, responds to technical questions within 24 hours, and offers clear warranty terms can command 20-30% premium pricing over competitors who compete on price alone.

Configuration Comparison: Choosing the Right Precision Level for Your Product

Not all beauty devices require the same level of CNC machining precision. The key is matching tolerance specifications to actual performance requirements while controlling costs. Here's a practical comparison of different configuration approaches:

Important Note: This article uses ±0.01mm precision as an example configuration for educational purposes. This doesn't mean ±0.01mm is always the best choice—different products have different requirements. The goal is to help you make informed decisions based on your specific needs.

CNC Machining Configuration Options: Pros, Cons, and Best Applications

Configuration	Cost Level	Pros	Cons	Best For
Standard (±0.05-0.13mm)	Low	Lowest cost, fastest production, widely available suppliers	Limited to non-critical parts, may not meet medical device requirements	Cosmetic housings, decorative components, budget consumer devices
Precision (±0.01-0.02mm)	Medium-High	Suitable for most functional assemblies, good balance of cost and performance, ISO 13485 compatible	3-5x baseline cost, requires specialized suppliers, longer lead times	HIFU transducer mounts, motor housings, critical mechanical assemblies, mid-to-premium devices
Advanced (±0.0025-0.005mm)	High	Medical-grade precision, enables ultra-compact designs, superior performance consistency	8-12x baseline cost, limited supplier base, requires clean room production for medical applications	Implantable components, ultra-precision bearings, research equipment, premium medical devices
Mixed Tolerance Approach	Medium	30-40% cost savings vs. all-tight tolerance, optimized for actual requirements, flexible design	Requires careful design planning, more complex quality control, needs experienced engineering team	Most production beauty devices, cost-optimized medical devices, products with both critical and non-critical features

Cost levels are relative. Actual costs vary by part geometry, material, batch size, and supplier. Mixed tolerance approach assumes 30-40% of features require tight tolerance, 60-70% can use standard tolerance ^[1]^[4].

When to Choose Each Configuration:

Standard Tolerance (±0.05-0.13mm):

Your device has no critical mechanical assemblies
You're targeting budget-conscious buyers
Aesthetic appearance is more important than functional precision
You're producing cosmetic accessories rather than functional devices

Precision Tolerance (±0.01-0.02mm):

Your device has functional assemblies that require precise alignment (HIFU transducers, motor mounts)
You're targeting mid-to-premium market segments
You need ISO 13485 certification for medical device compliance
Performance consistency is a key selling point

Advanced Tolerance (±0.0025-0.005mm):

You're manufacturing implantable or long-term skin-contact components
Your device operates at frequencies or pressures requiring ultra-precision
You're competing in the premium medical device segment
Performance differentiation justifies the cost premium

Mixed Tolerance Approach (Recommended for Most):

Your device has both critical and non-critical features
You want to optimize costs without compromising performance
You have engineering expertise to identify which features need tight tolerance
You're working with an experienced supplier who can implement variable tolerance zones

Real-World Example: HIFU Device Component Breakdown

A typical HIFU device might include:

Component	Recommended Tolerance	Rationale
Transducer mounting surface	±0.01mm	Ultrasound energy focusing requires precise alignment
Motor housing bore	±0.015mm	Motor bearing fit affects vibration and noise
Outer housing	±0.05mm	Cosmetic function only, no critical assembly
Battery compartment	±0.02mm	Waterproof seal requires consistent dimensions
Button actuators	±0.03mm	User feel important, but functional tolerance loose
Internal brackets	±0.05mm	Structural support, no precision required

By applying tight tolerances only where needed (transducer mount, motor bore, battery compartment = ~35% of features) and standard tolerances elsewhere, manufacturers can achieve 30-40% cost savings compared to applying ±0.01mm across all features ^[1].

Actionable Recommendations for Southeast Asian Exporters on Alibaba.com

Based on the analysis above, here are practical recommendations for Southeast Asian beauty device manufacturers selling on Alibaba.com:

For New Exporters (First-Time Alibaba.com Sellers):

Start with Standard Tolerance for Non-Critical Parts
- Use ±0.05-0.13mm for housings, decorative components, and non-functional parts
- This keeps initial costs manageable while you validate market demand
- Focus your budget on marketing and customer acquisition
Invest in Documentation, Not Just Certificates
- ISO certification alone won't differentiate you
- Provide sample FAI reports, material certs, and quality control procedures in your product listings
- Create a 'Quality Documentation' section in your Alibaba.com storefront
Offer Mixed Tolerance Options
- Present buyers with 'Standard' and 'Precision' configuration options
- Clearly explain the cost-performance trade-offs
- Let buyers choose based on their target market and price point
Leverage Alibaba.com Trade Assurance
- Use Trade Assurance for payment protection (builds buyer trust)
- Clearly define quality acceptance criteria in your Trade Assurance order
- Include tolerance specifications and inspection requirements in writing

For Established Exporters (Scaling on Alibaba.com):

Develop ISO 13485 Capability
- Medical-grade certification opens premium market segments
- HIFU, microcurrent, and laser devices increasingly require ISO 13485
- Position yourself as a 'medical-grade beauty device manufacturer'
Invest in CMM Measurement Equipment
- In-house CMM capability enables faster quality verification
- Provide CMM reports as standard with precision orders
- Use CMM data to demonstrate process capability (Cp/Cpk values)
Create Tiered Product Lines
- 'Consumer Grade' (±0.05mm, ISO 9001): Price-competitive, high volume
- 'Professional Grade' (±0.01mm, ISO 9001): Mid-range, balanced performance
- 'Medical Grade' (±0.01mm, ISO 13485): Premium, highest margins
- This captures buyers at different price points and requirements
Build Technical Content Library
- Publish tolerance guides, material selection guides, and design tips
- Share case studies showing how you solved specific manufacturing challenges
- Position your Alibaba.com storefront as an educational resource, not just a catalog

For All Exporters: Common Mistakes to Avoid

❌ Over-Specifying Tolerances

Don't default to ±0.01mm for everything 'to be safe'
This unnecessarily increases costs by 3-5x
Work with your engineering team to identify actual requirements

❌ Under-Documenting Quality

Don't assume buyers will trust you without evidence
Provide sample quality reports before receiving orders
Make documentation easily accessible (downloadable PDFs, video walkthroughs)

❌ Competing on Price Alone

Race-to-the-bottom pricing attracts problematic buyers
Differentiate through service, documentation, and technical expertise
Buyers willing to pay premium value responsive communication and problem-solving

❌ Ignoring After-Sales Support

Warranty claims and technical questions will arise
Have clear processes for handling complaints and returns
Quick, fair resolution builds long-term buyer relationships and positive reviews

Alibaba.com Platform Advantages for CNC Machining Suppliers:

Alibaba.com provides several unique advantages for beauty device manufacturers:

Global Buyer Reach: Access buyers from 190+ countries, including high-value markets (US 23.83%, Spain +117.1% YoY growth, France +95.24%, Italy +85.14%)
Trade Assurance Protection: Secure payment terms that build buyer confidence
Verified Supplier Program: Third-party verification of business credentials and capabilities
RFQ Marketplace: Buyers actively seeking suppliers post requests—you can quote directly
Data Analytics: Access to search trend data showing what buyers are looking for (e.g., 'facial cleans brush' has 2.24% click rate, indicating strong buyer interest)

Alibaba.com data shows that beauty device suppliers who provide comprehensive product specifications (including tolerance details, material certifications, and quality documentation) receive significantly more qualified inquiries than those with basic listings. This suggests that sophisticated B2B buyers actively seek out suppliers who demonstrate technical competence.

Alibaba.com Beauty Device Market: Facial Cleansing Brush category shows 15.82% YoY buyer growth, with 4,693 active buyers. Home Use Skin Analyzer subcategory growing at 70.21% YoY—the fastest in the category. US accounts for 23.83% of buyers, while Spain (+117.1%), France (+95.24%), and Italy (+85.14%) show the fastest growth rates.

The takeaway: technical competence + comprehensive documentation + responsive service = premium pricing power on Alibaba.com. Buyers are willing to pay more for suppliers who make their jobs easier and reduce their risk.