Personal Inventory

Personal inventory studies the relationships individuals develop with physical and digital products at home or work. This method reveals how people perceive, value, and interact with their possessions, insights that directly inform prototype design and reveal underlying lifestyle patterns.

Quick details:

Personal Inventory

Structure:

Semi-structured

Preparation:

Participant recruitment, recording tools

Deliverables:

Recordings, notes

Personal Inventory

Understanding Personal Inventory

Researchers ask:

  • How does the sample group use objects around them?
  • Do certain products take preference?
  • Are individuals tech-conversant?
  • Do digital products dominate non-digital ones?
  • What lifestyle implications arise from product preferences?

By understanding owned products and their competitive dynamics, researchers craft prototypes users will embrace, mirroring existing relationships while addressing unmet needs.

Categorization reveals behaviour: Frequency of use, interaction patterns, importance, sentimental value. Phones, chargers, keys travel everywhere. Laptops join meetings; external drives hold backups. Broken heirloom watches persist for memory.

Spatial clues matter: Accessibility (nightstand vs. drawer), grouping (phone/charger pouch), organization (color-coded files, stacked books) all signal interaction habits.

When and How to Use Personal Inventory?

Conduct one-on-one—either visiting users’ homes/workplaces or meeting elsewhere to examine possessions firsthand. Deep probing uncovers meaning, frequency, context: “Why this broken watch? How often this hard drive?”

This reveals physical, social, cultural contexts beyond function, exploring underlying feelings toward artifacts.

Advantages of Personal Inventory

1. Human-centered approach

Looks beyond intended function to design products deeply ingrained in users’ lives.

2. Empathy through observation

Sentimental value and cultural context emerge naturally through artifacts + stories.

3. Design direction

Product roles define specifications capturing true needs and desired behaviours.

4. Lifestyle cues

Reveals patterns other methods miss entirely.

Challenges of Personal Inventory

1. Time consuming

Observation+deep probing extends sessions; unconscious relationships need patience.

2. Requires skilled researchers

Rich insights demand observant facilitators experienced in meaningful probing.

3. Researcher bias risk

Emotional stories tempt unstated assumptions about user values.

Think Design's recommendation

Personal inventory uncovers lifestyle elements guiding design. Physical example: Design millennial workstations by studying what they carry daily, chargers, AirPods, notebooks reveal mobile work patterns.

Digital application: Scan handsets for frequently used apps. Usage patterns expose lifestyle preferences shaping app design.

Use when lifestyle insights drive functional requirements. Skip for simple survey/interview needs, this method transforms possessions into design intelligence.

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