Inventory, asset, and parts management in Field Service. Without it, field technicians waste time hunting for supplies, miss repair deadlines, and accidentally bill customers for parts that aren’t in stock. For the MB-910 exam, you need to understand how Dynamics 365 Field Service helps businesses track what they own, what they use, and what they need, so that service jobs happen smoothly and without costly delays.
Jump to a section
A simple way to picture Inventory, Asset, and Parts Management in Field Service
Have you ever tried to fix a leaky tap, only to realise halfway through that you left the correct size wrench in the shed at home?
That’s the frustration a field service technician faces every day when inventory, assets, and parts aren’t managed properly. Imagine you run a small landscaping business. You have a shed full of lawnmowers, trimmers, fuel cans, and spare blades. Each lawnmower is a piece of equipment you own — an asset. The spare blades and fuel are parts you use to keep them running. Your inventory is the exact quantity of every item in that shed at any moment.
Now, your best lawnmower breaks down while you’re at a customer’s house. You need a specific blade for that model. If your shed inventory says you have three of those blades, but your teammate already used two last week and forgot to record it, you’re stuck. You can’t finish the job. The customer is unhappy, and you lose money. In Dynamics 365 Field Service, the system tracks every asset you own, every part in the warehouse, and every item on the truck. When a technician uses a part, the system updates instantly. This means you always know exactly what you have and where it is, so you can fix things on the first visit. It’s like having a digital assistant who never forgets to update the shed log.
In simple terms, inventory management is the process of tracking every physical item a company owns or uses to perform services. In the world of Dynamics 365 Field Service, this includes everything from spare parts (like a replacement motor for a washing machine) to consumables (like lubricant or tape) and even loaner equipment that a customer might borrow while their machine is being repaired.
An asset is any piece of equipment that a company owns and wants to keep track of over time. For example, a wind turbine, an elevator, or a hospital MRI machine. Each asset has a service history, a location, and a set of parts that are compatible with it. In Field Service, you can link a specific asset to a customer record, so when a technician arrives, they know exactly what machine they are working on and what spare parts are approved for that model.
Parts management is about making sure the right components are in the right place at the right time. This includes warehouse stock (the main supply room), technician truck stock (the parts carried in a van), and customer site stock (parts stored at the customer’s location).
Here are the key concepts you will see on the MB-910 exam:
Inventory is the full list of items a company holds for sale or use in service. In Field Service, you can track inventory quantities at a warehouse level and on a technician’s vehicle.
Assets are the customer-owned or company-owned items that receive service. Each asset can have a warranty, an installation date, and linked parts.
Parts are the individual components used to repair or maintain an asset. They are a subset of inventory.
Product catalogue is the master list of all items (parts, tools, consumables) that can be used in service orders.
Inventory journals let you adjust stock levels when items are damaged, lost, or found.
Transfer orders move parts from a warehouse to a technician’s truck or from one warehouse to another.
Work order parts usage is the record of exactly what parts a technician used on a job, which then gets automatically deducted from the inventory.
How it works in practice: A customer calls to report that their air conditioning unit (an asset) is broken. The dispatcher creates a work order and assigns a technician. The system checks the technician’s truck stock. If the required compressor part is not on the truck, the system can trigger a transfer order to move it from the warehouse to the truck before the technician leaves. When the technician finishes the job, they enters the parts used into the work order. The system automatically reduces the truck stock and the warehouse inventory by the correct amounts.
Why this replaces the old way: Before systems like Dynamics 365, technicians wrote parts down on paper forms. Those forms went to a clerk who typed them into a spreadsheet hours or days later. By then, the inventory count was wrong, and the next technician might arrive at a job without the needed part. Field Service automates this in real time, so the data is always accurate. It also helps companies avoid overstocking (tying up cash in unused parts) and understocking (missing jobs due to lack of parts).
For the exam, remember that inventory, asset, and parts management are tightly linked. Every part used must be deducted from inventory. Every asset must have a service history. Every work order can consume parts. You need to know that Field Service uses a product catalogue as the single source of truth for what items exist, and that inventory adjustments are used to correct errors or account for wastage.
Define the product catalogue
The warehouse manager or administrator enters every part, tool, or consumable into the product catalogue. Each item gets a name, product ID, unit of measure, and a flag for whether it is inventory-controlled. This is the foundation — no item can be tracked or used without being in the catalogue.
Set up warehouses and vehicle stocks
Create a warehouse record for the main stockroom. Then create a separate warehouse for each service vehicle, choosing the type ‘service vehicle.’ This tells the system that the van can hold inventory. Assign a load template to each vehicle warehouse to define which parts the van normally carries.
Associate inventory with work orders
When a work order is created, the system checks the assigned technician’s vehicle warehouse to see if the required parts are in stock. If not, it can suggest a transfer. This step links the inventory system directly to the scheduling process, so no one arrives at a job without the right parts.
Record parts used on the work order
The technician opens the work order on their mobile app and selects the product line. They enter the quantity of each part used. The system automatically decreases the inventory at that vehicle warehouse. This step is the core of inventory accuracy — it captures consumption in real time.
Reconcile inventory with adjustments and transfers
At the end of a shift, a warehouse worker may need to adjust inventory if a part was damaged or found. They use an inventory journal to add or remove stock. If parts need to move between vans or back to the main warehouse, they create transfer orders. This step keeps the system honest.
An IT professional working with Dynamics 365 Field Service rarely manages the inventory itself — that’s the warehouse manager’s job. Instead, they configure the system so that the warehouse team and the field technicians can do their work without friction.
Here is a concrete scenario:
A heating and cooling company, “CoolAir Ltd,” has 20 vans and 1 central warehouse. The IT administrator, Priya, needs to set up inventory management in Field Service. She starts by adding the product catalogue: every part the company uses, from refrigerant to fan belts to copper piping. Each part gets a unique product ID, a unit of measure (like “each” or “litre”), and a default price.
Next, Priya configures the warehouse as a single inventory location. She also sets up each van as a “warehouse” of type “service vehicle.” Now the system can track inventory levels for both.
The tricky part: Priya must define which parts are “stocked” on each van. For example, Van 1 covers residential repairs, so it carries common fan motors and capacitors. Van 2 covers commercial buildings, so it carries larger compressors. Priya sets up “load template” profiles for each van type.
When a work order comes in, the dispatcher can see which van has the correct parts in stock. If a van is missing a part, the system automatically suggests a transfer order from the warehouse to that van. The warehouse worker picks the part, books it out of warehouse inventory, and books it into the van’s inventory.
At the end of each day, technicians use a mobile app to record parts used. The system runs a nightly job to reconcile inventory: it compares what was on the van at the start of the day, subtracts what was used, and adds any returns. If there is a mismatch (e.g., a part was dropped and broken), Priya teaches the warehouse lead to create an inventory journal to adjust the quantity down.
The IT professional also sets up asset registers. For CoolAir, each customer’s heating unit is an asset. Priya imports a spreadsheet of all customer equipment, linking each asset to the correct customer account and location. Now, when a technician opens a work order for that customer, they see all the assets at that site, including the age and warranty status.
Finally, Priya creates a few simple reports:
Stock count by van (to know which vans need restocking)
Parts usage by asset type (to see which models break most often)
Inventory accuracy (to catch discrepancies between physical count and system count)
She does not touch the physical inventory. Her job is to make sure the system is set up so that when the warehouse manager clicks “transfer,” it works, and when the technician uses a part on a work order, it is accurately deducted. If something goes wrong (like a part being used but not recorded), Priya checks the audit trail to find the error.
The MB-910 exam (Microsoft Dynamics 365 Fundamentals CRM) tests your ability to recognise which Field Service capabilities relate to inventory, assets, and parts. You will NOT be asked to perform technical configuration steps. Instead, the exam asks you to identify the correct tool or process for a given business scenario.
Here are the exact topics you must know:
The difference between a product (anything you sell or use) and an inventory item (a product you physically stock). The exam loves to ask: “Which records track items that are stored in a warehouse?” The answer is “Inventory item records,” not “Product records.”
Asset lifecycle: An asset can be created from a work order (if a technician installs a new machine) or manually. The exam will test that assets are linked to customer accounts and that service history is stored on the asset record.
Parts usage: On a work order, service line items can be of type “Service” (labour) or “Product” (parts). The exam asks: “What happens to inventory when you use a product line item on a work order?” Answer: It reduces inventory automatically (if the product is inventory-controlled).
Inventory adjustment types: positive adjustment (add stock), negative adjustment (remove stock), and transfer. The exam gives a scenario like “a technician returns an unused part to the warehouse” and asks which record type handles that. The answer is a “transfer order” or “inventory transfer,” not an adjustment.
Warehouse types: The exam lists “Service vehicle” as a warehouse type. They will test that a van can be a warehouse.
Product catalogue: The master list of all items. The exam might present a scenario where a company uses a part that is not in the catalogue and asks what the first step is. Answer: Add the part to the product catalogue.
Common traps on the exam:
They will mix up “asset” and “product.” Remember: a product is a sellable/usable item. An asset is a piece of equipment being serviced. A product can become an asset if it is installed at a customer site.
They will try to trick you into thinking an inventory adjustment is the same as a transfer. An adjustment corrects a count (e.g., when a part is broken). A transfer moves stock between locations.
They will present a question about recording parts used and ask “where do you record this?” The answer is on the work order (service line or product line), not in a separate inventory log.
The exam often uses the phrase “customer assets” to mean equipment owned by the customer. Be clear: an asset can be customer-owned or company-owned.
Key definitions to memorise for the exam:
Product catalogue = all items available for purchase or use.
Work order product line = the record of a part used on a specific job.
Inventory journal = used to manually correct stock levels (e.g., for breakage).
Transfer order = moves stock from one warehouse to another.
Asset = a physical item that receives service.
Vehicle stock = inventory kept on a technician’s van.
Inventory management in Field Service tracks stock at warehouses, on service vehicles, and at customer sites, not just in a central store.
A product becomes an inventory item only when you want to track its physical quantity on hand.
Customer assets are pieces of equipment that receive service, and they store a full history of all work orders and parts used on them.
Using a part on a work order automatically reduces inventory if the product is set to be inventory-controlled.
Transfer orders move parts between locations (warehouse to truck, truck to warehouse), while inventory adjustments correct errors or account for damage.
The product catalogue is the master list of all items; every part used in field service must exist in this catalogue first.
These come up on the exam all the time. Here's how to tell them apart.
Product
A product is any item in the catalogue that can be sold or used in service.
Does not require a physical quantity to be tracked.
Examples include services, digital goods, and physical parts when stock tracking is off.
Inventory Item
An inventory item is a product where physical stock levels are tracked.
Requires a warehouse location and on-hand quantity to be maintained.
Used for parts that are physically stocked on trucks or in warehouses.
Inventory Adjustment
Changes stock quantity at one location without affecting another location.
Used for correcting errors, damage, or loss where no movement happens.
Records a positive (add) or negative (remove) adjustment to quantity.
Transfer Order
Moves stock from one warehouse/vehicle to another.
Affects both the source (deduct) and destination (add) locations.
Used when a technician needs replenishment from the central warehouse.
Customer Asset
A customer asset is a record of a specific piece of equipment owned by or located at a customer site.
Tracks service history, warranty, and location over the life of the equipment.
Created when a product is installed and registered as an asset.
Product Installed
A product installed is simply a product line on a work order indicating something was placed at a site.
Does not have a separate service history record; it only exists within that work order.
Without converting to an asset, the installation is not tracked beyond the single work order.
Work Order Product Line
Records a part used on a specific service job.
Automatically reduces inventory at the source warehouse (usually vehicle stock).
Linked to a work order and customer asset for billing and history.
Inventory Journal
Records a manual change to stock level that is not tied to a specific work order.
Used for breakage, theft, discovery of extra stock, or physical count corrections.
Does not affect billing or asset history; it only corrects the quantity on hand.
Mistake
Inventory management is only about counting how many items you have in a warehouse.
Correct
In Field Service, inventory management also covers stock on technician vans, at customer locations, parts that have been reserved for future jobs, and items that are in transit between locations.
People think of inventory as a single location, but Field Service treats every van and customer site as its own warehouse, so the concept is broader.
Mistake
A product and an inventory item are the same thing, just different names.
Correct
A product is any item you sell or use. It becomes an inventory item only if you physically stock it and track the quantity. Some products (like software licences that are delivered digitally) are not inventory items.
The terms are used loosely in everyday speech, but Microsoft Dynamics separates them because not all products are tracked for stock levels.
Mistake
Once you install a product at a customer site, it remains a product in the system.
Correct
When a product is installed at a customer site (e.g., a new boiler), it should be converted into a customer asset. The product record tracks inventory quantity; the asset record tracks the history and location of that specific unit.
Beginners assume a product stays the same record type forever, but Field Service uses different record types for stock tracking versus installed equipment ownership.
Mistake
Inventory adjustment and inventory transfer are the same process.
Correct
An adjustment changes the quantity of stock at a single location (adding or removing), whereas a transfer moves stock from one location to another, affecting both locations’ inventories simultaneously.
Both involve changing numbers, so it is easy to confuse them, but the exam tests the distinction carefully.
Reveal each answer, then mark whether you got it right. Score 60%+ to unlock the next chapter.
A product is any item in the catalogue that you can sell or use. An inventory item is a product that you physically stock and for which you track quantities. A product becomes an inventory item when you enable ‘track inventory’ on its record.
Yes. In Dynamics 365 Field Service, you can set up a warehouse with the type ‘service vehicle.’ This allows you to track inventory on a technician’s van just like you track stock in a physical warehouse.
You add a product line to the work order. Select the part from the catalogue, enter the quantity used, and the system will automatically deduct that quantity from the related warehouse (usually the technician’s vehicle warehouse).
You create a negative inventory adjustment using an inventory journal. This reduces the stock count without recording it as used on a work order. The journal can include a reason code like ‘damaged.’
Yes, normally a customer asset is linked to a customer account record. This ties the asset to the site where it is installed, so all service history and parts usage can be tracked against that specific machine and that specific customer.
Yes. A transfer order deducts stock from the source warehouse (the main store) and adds stock to the destination warehouse (the van). Both inventory counts update immediately in the system.
You've finished Inventory, Asset, and Parts Management in Field Service. Continue through the MB-910 study guide to build a complete picture of the exam.
Done with this chapter?