The document discusses the evolution of shaving razors from straight blades to modern multi-blade systems. Early razors required constant sharpening, were unsafe, and difficult to use. Razor manufacturers then began using modular designs with replaceable blades to improve safety and reduce costs. Later, safety razors with a single fixed blade made shaving easier and more accessible. Razors then transitioned to include two and three-blade systems for faster shaving with fewer strokes. Modern razors include lubricating strips, blade life indicators, and grips for additional comfort and convenience.

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Case Study
Shaving

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Shaving
 Requirements
 Grooming
 Look/Quality
 Safety
 Speed
 Cost

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Straight Blade
•Required constant sharpening
•Very unsafe to use/transport
•Difficult to use

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Modularity
 Component/Modularise the elements
 Replace blades rather than whole
instrument
 Aim to avoid uneven wear between
components
 Reduces costs

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Safety Razor
 Single blade
 Easier to use
 Increases usability to home

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Barber Home

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Transition to bi & poly systems
1 Blade
2 Blades
3 Blades

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Single Blade
Fixed Head
Disposable
Double Blade
Flexible Head
Disposable
Double Blade
Flexible Head
Permanent Handle
Lubra-strip
Double Blade
Flexible Head
Permanent Handle
Lubra-strip
Gripped Handle
Triple Blade
Flexible Head
Permanent Handle
Lubra-strip
Gripped Handle
Wear Indicator
Grip Strip
Evolution of Product

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Advanced Features
 Lubricating strip
 Indicator of blade life
 Grip strip

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 Multiple blades
 Fewer strokes
 Less time
 Less energy

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 Specific Need
 Travelling
 Disposable razors
 Cheap blades
 Plastic handles
 One-time-use
 All-in-one kit
 Bundling
 Fully disposable

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Evolution
Evolution of subsystems….

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Increasing usability
 Expansion of usage of technology
 Women’s shavers
 Use same blades with different handles