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Difficulty: MediumConsumption-Based Model (CapEx vs OpEx)

A medical imaging clinic operates from 8:00 AM to 6:00 PM on weekdays. The clinic is planning a new patient portal that requires high compute power during operational hours but remains completely idle at night and on weekends. The clinic decides to host the portal on Azure virtual machines using a consumption-based pricing model.

How does this decision affect the clinic's capital expenditure (CapEx) and operational expenditure (OpEx) compared to deploying the portal on-premises?

  1. The clinic reduces CapEx by avoiding the purchase of physical servers, and their OpEx fluctuates based on the actual compute hours used.Answer
  2. B
    The clinic increases CapEx due to the upfront cost of reserving cloud capacity, but their OpEx is eliminated because there are no maintenance costs.
  3. C
    The clinic's monthly cloud billing is classified as CapEx, allowing them to depreciate the virtual machines as physical assets over time.
  4. D
    The clinic pays a fixed monthly OpEx that matches the cost of running the virtual machines continuously, 24 hours a day.

Answer

The clinic reduces CapEx by avoiding the purchase of physical servers, and their OpEx fluctuates based on the actual compute hours used.
The correct option is the one stating that CapEx is reduced by avoiding server purchases and OpEx fluctuates. This is correct because deploying to Azure avoids upfront hardware procurement (reducing CapEx), and stopping virtual machines during off-hours ensures the clinic only pays for active usage (resulting in a fluctuating OpEx).

Step-by-Step Solution

1
Identify the financial model of on-premises vs cloud deployment.
On-premises requires upfront hardware purchases (CapEx), while Azure cloud resources operate on a pay-as-you-go, consumption-based model (OpEx).
This establishes the basic distinction between Capital Expenditure (CapEx) and Operational Expenditure (OpEx).
2
Analyze the impact of the clinic's specific workload schedule (8:00 AM to 6:00 PM, idle at other times).
By using Azure virtual machines, the clinic can stop the machines when not in use. Under a consumption-based model, they are only billed for the hours the virtual machines are active, leading to variable OpEx.
This connects the scenario's temporal constraint to the flexible nature of consumption-based billing.
3
Combine the CapEx reduction and variable OpEx findings to select the correct choice.
CapEx is reduced because no physical servers are purchased, and OpEx fluctuates with usage.
This leads directly to the correct statement explaining the financial benefits of the cloud migration.

Key Concept

Under a consumption-based cloud model, organizations shift from CapEx (upfront physical hardware investment) to OpEx (ongoing operational costs based on actual resource usage).

Alternative Method

Another way to view this is by comparing it to utility billing: you only pay for electricity when the lights are turned on, unlike building your own power station upfront.
Estimated Time:1m 0s
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Consumption-Based Model (CapEx vs OpEx)

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