Got two different answers from two different people on our team about how to structure our parts catalog and I'm trying to figure out which way actually makes sense before we commit.
Option A: Flat catalog with everything at top level, use tags and custom fields to categorize. Search handles the rest.
Option B: Hierarchical categories — Category > Subcategory > Part. More structure upfront, more clicking to find things.
We're at about 800 parts now and growing. Don't want to rebuild this in six months because we picked wrong.
What's actually working for people at scale?
Go flat. **800 parts is nothing.** We run 4,200+ SKUs in a flat catalog with heavy tag usage and it's fast, flexible, and your techs in the field will actually find what they need. Hierarchical sounds nice in a meeting but becomes a straitjacket when your business evolves and you realize "Electrical > Wire > Copper > Stranded" doesn't fit your new fiber line.
Pro tip: Spend your energy on consistent **naming conventions** and **required fields** at the part level, not on building a taxonomy that'll fight you later. We tag by function, location type, and seasonal rotation. Way more useful than nested folders.
Another way to think about it: hierarchy pays off at scale if you have clear operational boundaries. My organization runs three distinct service lines with minimal parts overlap — HVAC, electrical, and plumbing. The hierarchy keeps technicians in their lane and prevents cross-contamination of inventory counts.
That said, flat with tags works well when technicians wear multiple hats and need to discover related parts across categories. The question isn't which structure is better abstractly — it's whether your 800 parts represent one business or several businesses sharing a warehouse. The answer to that shapes the right choice.
Fair point on operational boundaries — if your techs literally never touch other categories, hierarchy has merit. But I'd push back on "prevents cross-contamination." That's what permissions and location-based inventory views solve, not nesting. A part in the wrong category is just as lost as a part with the wrong tag.
The real risk is **rigidity**. FieldPulse's search is good. Tags are indexed. Hierarchy is just cosmetic organization that becomes technical debt when you acquire a company, add a service line, or your "electrical" team starts doing low-voltage work and suddenly you need cross-cutting categories.
In my experience, both of you are overthinking this. I've seen flat catalogs turn into garbage dumps where nobody trusts the data, and I've seen hierarchies so deep that techs create "misc" parts to avoid navigating five levels to log a resistor.
The actual fix: who owns maintenance. Doesn't matter flat or nested if no one's curating. Assign someone to audit monthly, enforce naming standards, and delete duplicates. That's what saves you in six months, not your folder structure.
Hi Mike! Great question — this comes up often during implementation. Here's what I'd recommend based on what I've seen across accounts:
Start flat, plan for hierarchy. FieldPulse lets you add category/subcategory fields after the fact without breaking existing parts or work orders. If you begin with a solid tagging scheme and consistent naming (as Gwen mentioned), you can always introduce hierarchy later once you understand your actual usage patterns.
A few practical notes:
Search performance — flat catalogs with good tags search faster in the mobile app, which matters when techs are in the field.
Reporting flexibility — tags are filterable in reports; deep hierarchy can complicate rollup views.
Bulk changes — re-tagging 800 parts is painful but possible. Re-parenting 800 parts across nested categories is more error-prone.
We have guidance on setting up your initial catalog structure in Setting Up Your Parts Inventory and Adding and Editing Inventory Items.
If you're unsure, I'd suggest prototyping with your top 50 most-used parts in both structures and seeing which feels natural to your dispatchers. Happy to connect you with our implementation team if you'd like a brief review of your specific part mix.
