Business spreadsheet reviews and repairs
Your business needs numbers it can trust.
We review the Excel workbooks behind your pricing, budgets and reporting. We explain the risks we find and prepare a practical repair plan.
19 800 CZK excl. VAT · report within 5 business days
34 sheets and 80 dependencies between them.
11 hidden sheets and their links to the rest of the workbook.
The longest calculation chain spans 13 sheets.
Analysis of a synthetic sample workbook
Findings in the sample workbook
From first contact to a clear decision
What happens to your workbook
Each step makes clear what we need from you and what we deliver. Start by describing the problem; we arrange the file transfer together.
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Reply within 1 business day
Describe the problem
- From you
- Tell us what the workbook does, who uses it and what needs attention. No attachment.
- From us
- We reply with a signed confidentiality declaration and agree on the next step.
Step outcomeAn agreed next step
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Before you order
Agree on scope and transfer
- From you
- Provide context during the introductory call. Transfer the file through the agreed secure channel.
- From us
- We confirm scope and price. The fixed price covers one xlsx/xlsm with up to 15 sheets, 10 MB and 1,000 lines of VBA.
Step outcomeScope, price and secure transfer
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Report within 5 business days¹
We review the workbook
- From you
- We have your workbook and introductory answers. We clarify any remaining questions with you.
- From us
- We map sheets and formulas, assess findings and prepare a remediation plan with time and cost estimates.
Step outcomeA 10–16-page PDF report
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30-minute call within 14 days of delivery
Review the findings together
- From you
- Decide which further work makes sense for your business.
- From us
- We explain the findings and recommendations. You can commission us to carry out repairs or use your own maintainer.
Step outcomeFindings and a plan for further work
¹ The period starts once we have received the workbook, sent the confidentiality declaration and received your introductory answers.
The full processInside the review
Two cells. A calculation in a loop.
Our sample workbook contains a loop between two cells. Open each step to see how we assess a finding like this.
Kontrola!C20reads from ↓Kontrola!C21↳ reads from Kontrola!C20What we found
Kontrola!C20 and Kontrola!C21 form a cycle: one cell depends on the other, and the path returns to its starting point. This relationship is recorded in the analysis snapshot.
What it could mean
We check whether the cycle is intentional and whether the workbook uses iterative calculation. A cycle alone does not establish that the business result is wrong.
What we would recommend
For an unintended loop, we propose separating the input from the check calculation. For intentional iteration, we recommend documenting the settings and checking results against known examples.
This example explains a static-analysis finding. We do not recalculate the workbook or run macros. Repairs are commissioned separately.
Open the full sample reportWhen to contact us
A workbook that is difficult to maintain
When a workbook informs pricing or budgets, its calculations need to be understandable. We inspect the dependencies and identify areas that need attention.
Unclear file versions
Several copies are in circulation, with no clear record of which is current.
Knowledge held by one person
Only the author knows how to operate or change the workbook and may not be available.
Unexplained changes in results
Results change even though you have not edited the input data.
Written assessment
A clear basis for improving your workbook
You receive a description of the workbook, explained findings and a remediation plan with estimated hours and costs. The report is written for decision-makers as well as spreadsheet users.
What the review includesWorkbook map
Sheets, hidden components and their dependencies.
Explained findings
Specific cells and risks ranked by severity.
Remediation plan
Recommended sequence of work, estimated hours and costs.
19 800 CZK excl. VAT
Up to 15 sheets · no deposit · payment due in 14 daysOur method in practice
Dependencies beyond the visible cells
We created this sample workbook to demonstrate the analysis. Its figures and diagrams come from the tool we use for diagnostic reviews.
Fragility index
An indicator of how difficult safe changes may be, on a scale from 0 to 100. The report explains the calculation and its limitations.
- Formulas in the workbook
- 592
- Dependencies between sheets
- 80
Follow-up work
Repairs, documentation and development
Choose the work you need from the remediation plan. We can carry it out, or you can assign it to your own maintainer.
About us
Building business spreadsheets since 2011
Fixcelo is operated by Surman s.r.o. Our work draws on Jaroslav Surman’s 30 years of experience with Excel. We also work with VBA, Python, databases and Power Query.
More about usKeeping your data confidential
We send a signed confidentiality statement with our first reply and agree a secure transfer method before you send the file.
The form does not accept files. We do not upload client data to public AI services; analysis runs locally.
Secure file transferHow we work
Analysing structure and dependencies
Our tool reads the saved workbook structure, formulas and sheet dependencies. We do not run macros during analysis.
Read about the method
We assess circular references, external links and other findings in the context of how you use the workbook. The report explains their significance and recommends a sequence for repairs.
Static analysis does not recalculate the workbook or establish whether its business results are correct. We document the method’s limitations alongside the findings.
Before you order
Frequently asked questions
What does the review establish?
We describe the workbook structure, formulas, dependencies and findings, with a remediation plan and estimated hours and costs.
How much does the report cost?
The review costs CZK 19,800 excl. VAT (CZK 23,958 incl. VAT). We invoice after delivery, with payment due in 14 days. No deposit is required.
Do we also need to order repairs?
You can arrange repairs yourselves. You may use and share the report and remediation plan.
Should we send the workbook now?
Please describe what you need first. The form does not accept attachments; we agree secure transfer after sending our confidentiality statement.
Let’s discuss what your workbook needs
Tell us what the workbook is used for and where you need help. We will reply within one business day to agree the next step. Please do not send the file yet.
Discuss your workbook jaroslav@surman.cz