From Findings to Fixes: Building a 100-Day Technology Remediation Plan

Technical due diligence is only valuable if it changes what happens next. A report can identify access weaknesses, fragile dependencies, delivery bottlenecks and gaps in engineering capability. But an unprioritised list rarely helps an incoming board or management team decide what to do on Monday morning, what to resource this quarter and what belongs in the longer-term value-creation plan.

In FoundationState diligence engagements, we move from scoping to data-room review, evaluation, interviews, findings and readout. The remediation plan continues that evidence-led process after close. It gives each material finding a decision, an owner, a time horizon and a definition of done, so the acquirer can protect deal value while the operating company keeps serving customers.

What should a 100 day plan technology programme achieve?

A 100 day technology plan is not a second diligence report and it is not a backlog clean-up exercise. It is an operating plan for the risks and opportunities that matter most in the first post-acquisition period. The plan should make clear which issues threaten security or continuity, which constrain the investment thesis, and which require more discovery before a larger commitment is made.

The best plans are deliberately selective. They distinguish between a critical privileged-access gap and a useful refactor; between an expiring supplier agreement and a product enhancement that can wait for normal prioritisation. This protects management capacity and avoids the common post-close error of asking a small technology team to fix everything at once.

For a deal team, the output should answer four practical questions:

1. 1What must be controlled immediately to keep the business secure and trading?
2. 2What will undermine customer delivery, growth or planned synergies if left unresolved?
3. 3What investment, specialist support or leadership capacity is required?
4. 4What evidence will show the board that the risk has genuinely reduced?

This follows naturally from a technical due diligence assessment. The diligence report establishes the condition of the estate; the 100-day plan establishes the response. It should preserve the link back to original evidence, rather than converting specific findings into vague transformation language.

How do you turn a diligence risk register into action?

Start by normalising the findings. A risk register often mixes observations, underlying causes, recommendations and symptoms at different levels of detail. Before planning, group related items into manageable workstreams—for example identity and access, operational resilience, vendor control, engineering effectiveness and architecture. Then test each workstream against consequence, urgency, effort and confidence in the evidence.

The central prioritisation decision is not simply high versus low severity. It is whether the action is both valuable and executable in the period. A serious architectural limitation may need a funded discovery phase before any responsible fix can begin. A moderately serious billing-control gap may have a straightforward fix that should happen in week one.

This is where independent judgement helps. A target may describe every historical workaround as business-as-usual, while an investor may see every imperfect practice as a deal issue. The plan should be evidence-based enough to avoid both instincts. FoundationState’s guide to reading a technical due diligence report explains why the underlying evidence and implication matter as much as the severity label.

What belongs in the first 30 days after acquisition?

The first 30 days should focus on control, continuity and certainty. The aim is to ensure that the new owner can administer critical systems, respond to an incident and understand the dependencies that keep customers live. This is not the moment for a broad re-platforming programme.

Typical first-month actions include transferring privileged access to controlled corporate accounts, confirming emergency recovery routes, securing domain and certificate renewals, checking cloud and software billing, and documenting critical supplier contacts. If key people are leaving or changing roles, capture operating knowledge while it is still available. These are practical extensions of the Day-1 readiness and ownership-risk review.

Security quick wins deserve particular attention. Close unnecessary administrator accounts, require multi-factor authentication where it is absent, confirm logging and incident contacts, and establish an approval route for high-impact changes. None of these actions makes a company completely secure, but they reduce the chance that an ownership transition turns a known weakness into an avoidable incident.

The plan should also establish governance. Nominate an executive sponsor, a technology owner and a board-level forum for material exceptions. A fortnightly update can be enough when it names the completed action, the evidence, the next decision and any blocked dependency. A red-amber-green summary without those facts can conceal more than it reveals.

What should happen in days 31 to 60?

The next horizon turns urgent control work into repeatable operating practice. This is often where the company needs to make modest, high-leverage investments: basic observability, clearer on-call arrangements, ownership for supplier management, a more disciplined release process, or engineering capacity in a known bottleneck.

It is also the point to test the assumptions behind the investment case. If the thesis relies on faster product delivery, a new market segment or margin improvement, the remediation plan should identify the technology capabilities that enable those outcomes. For example, a manual deployment process may not be a security issue, but it may make the promised product roadmap unachievable without additional automation and release discipline.

The review of engineering-team capability and key-person risk can be especially useful here. A plan that assumes a stretched technical lead can simultaneously retain knowledge, recruit, rebuild controls and deliver a major roadmap is not a plan; it is an uncosted dependency. Set realistic ownership, bring in temporary expertise where justified and make the trade-off visible to the board.

How do days 61 to 100 build structural value?

Days 61 to 100 should convert the early diagnosis into a funded sequence for the next two or three quarters. Some changes may be under way by this point: a resilience improvement, replacement of an unsupported component, a cloud-cost control programme or a revised product-and-engineering operating model. Others may be ready for a decision only after the first weeks of evidence gathering.

The objective is not to declare remediation complete on day 100. It is to leave the business with a credible, owned path for the structural work that could not sensibly be completed sooner. That path should show scope, cost, milestones, dependencies, expected benefit and the operational risks of delay.

This is also the right point to reconcile remediation with the roadmap. Some technical work directly enables growth; some reduces downside; some merely makes later work easier. Treating every initiative as equally strategic causes friction between management and the investor. A good plan is explicit about those categories, so product commitments and risk reduction can be sequenced together rather than traded off by surprise.

Who owns remediation after close?

Management should own delivery, but ownership does not mean isolation. The board and investor should agree the outcomes, resource constraints and escalation thresholds. The incoming technology leader or interim adviser should translate the plan into work the team can execute. Specialist suppliers may own bounded technical tasks, but the operating company must retain accountability for the resulting control or capability.

The governance model should match the risk. A critical security or continuity matter may need weekly oversight until closed. A platform modernisation may need a monthly steering decision. Do not use investor pressure as a substitute for technical leadership: it can accelerate reporting while making delivery less effective. Equally, do not leave material remediation as an informal CTO promise with no budget, milestone or board visibility.

Deloitte’s UK M&A integration practice frames integration as a workstream spanning the transaction lifecycle. For technology, that means the deal model, management plan and remediation budget need to agree. A finding that requires additional people or supplier spend should be reflected in the value-creation assumptions, not discovered after the plan has been approved.

How should boards track progress without derailing the roadmap?

Boards should track outcomes and evidence, not activity volume. “Access review completed” is weak if nobody can show that corporate owners have recovered accounts and tested emergency access. “Migration started” is weak if customer impact, cost and exit criteria are unknown. Each material action should have a named owner, a target date, a concise metric or artefact, and an agreed route when it slips.

Use a small number of measures that connect remediation to operational health: privileged accounts under corporate control, critical services with known recovery owners, deployment lead time, unresolved high-severity issues, supplier renewals with confirmed ownership, and progress against explicitly funded structural work. The purpose is not to manufacture precision. It is to make delay and residual risk visible early enough for a decision.

If the original diligence found deeper uncertainty, consider an independent follow-up review after the first 100 days. That review should test the evidence of closure, not merely compare status updates with the original list. It can also reset the plan where new facts emerge once the acquirer has normal access to systems, people and customer data.

Get an independent view of how to turn diligence findings into a practical value-creation plan. Contact FoundationState to discuss a 100 day technology plan, post-acquisition remediation priorities and proportionate oversight for the next stage of ownership.

Frequently Asked Questions

What should a 100-day technology plan include?

A 100-day technology plan should include immediate continuity and security actions, named owners, evidence of completion, resource needs, key dependencies and a sequenced route into longer-term improvements. It should distinguish Day-1 controls from operational foundations and structural changes, so management can protect the business without losing sight of product delivery and the investment thesis.

How do you prioritise remediation after an acquisition?

Prioritise remediation by consequence, urgency, effort, dependency and the confidence of the supporting evidence. Address risks that could interrupt trading, expose data or block critical growth first. Then build the operating practices and funded programmes that remove deeper constraints. Not every diligence finding needs immediate delivery; every material finding needs an explicit decision and owner.

Who is responsible for fixing due diligence findings?

The operating company’s management team is responsible for delivery, usually led by the technology owner. The board and investor should set priorities, approve material resources and monitor risk. External specialists can complete defined work, but accountability for controls, delivery outcomes and residual risk should remain with named leaders inside the business.