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Why does the remaining 5% slow down the project completion?

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Sandeep Kashyap CEO| ProofHub India

I’ve noticed that projects often move quickly in the beginning, but the final stretch, the last 5 -10%, drags on much longer than expected. 



What makes this last phase so challenging, and how can teams keep momentum until the very end?

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Kiron Bondale Retired | Mentor| Retired Welland, Ontario, Canada
Aug 18, 2025 9:24 AM
Replying to Sandeep Kashyap
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I couldn’t agree more, leaving the tricky requirements till the end is like keeping the hardest assignment for the last day. The project looks 'green' on dashboards, but the risk is quietly accumulating. Do you think agile/iterative approaches help here, or do they just shift the risk?
If the team embraces one of the tenets of adaptive approaches it would definitely use level of risk as a prioritization criterion for work items and tackle some of the riskiest items early on to reduce the cost of failure and to increase the level of confidence as time passes.

Kiron
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1 reply by Sandeep Kashyap
Aug 19, 2025 4:21 AM
Sandeep Kashyap
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Absolutely, Kiron. Addressing high-risk items early is definitely the key to make the final stretch more manageable. These hidden dependencies that show up later are often the real culprits, and that’s what makes the final 5% so tricky.
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Lissette Indhira Pimentel Sosa
Community Champion
Program Manager| HARPER SRL Santo Domingo / Distrito Nacional, Dominican Republic

The last 5% of a project often slows down completion because it sometimes involves the most complex and unpredictable work. Early stages are about building the bulk of deliverables, but the final stretch is where:
- Details matter most, polishing, fine-tuning, and integrating take more time than expected.
- Dependencies pile up, final tasks often rely on everything else being finished and aligned.
- Hidden issues appear, testing, quality checks, or stakeholder reviews reveal gaps that need fixes.
- Perception of “almost done”, teams may underestimate the effort left, leading to delays.
In short, the “last mile” is not just finishing tasks; it’s ensuring everything works together, meets quality standards, and satisfies stakeholders, making it disproportionately slower than the earlier 95%.

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1 reply by Sandeep Kashyap
Aug 19, 2025 4:22 AM
Sandeep Kashyap
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I couldn’t agree more, the ‘last mile’ is mostly about integration, polish, and quality assurance, often the trickiest parts of the project. I like how you framed it as ensuring everything works together. You really need strong cross-team alignment and discipline in reviews to make that last part as easy as possible.
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Pavan Maddi
Community Champion
Buona Vista, Singapore
The final stretch is tough due to scope creep, burnout, and complex tasks. Keep momentum by breaking down tasks, celebrating wins, prioritizing, and clear communication.

Support the team and manage scope tightly!
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1 reply by Sandeep Kashyap
Aug 19, 2025 4:22 AM
Sandeep Kashyap
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Pavan, I completely agree, scope creep and burnout can silently eat away at the final stretch. I like your point about celebrating small wins; it really does recharge morale when energy levels dip. From your experience, which has been harder to manage in the final 5%, scope creep or team burnout?
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Aaron Porter
Community Champion
IT Director| Blade HQ Payson, UT, United States
Aug 18, 2025 9:24 AM
Replying to Sandeep Kashyap
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I like how you framed it, it’s less about momentum and more about the unknown unknowns. Those cascading bugs can be brutal. I’ve seen countless teams really struggle to decide whether to cut scope and launch or push deadlines to polish. How would you recommend balancing that trade-off without losing stakeholder trust?
How would I recommend balancing that trade-off without losing stakeholder trust?

Transparency. Open, honest communication, and no attempt to bias the decision. I only make a recommendation if they ask (for the most part). It's a conversation something along the lines of, "Here's where we're at, here's the impact if we can't go live without this, here's the impact if we wait until after launch to fix and implement this ... (allow time for questions) ... How would you like to proceed?"

I said "for the most part" because, for example, there are times when it's better to deliver something functional by a constraining deadline, such as compliance, than to miss the deadline and not be able to communicate with the compliance authority when we'll be able to launch. The sponsor is usually aware of compliance dates, but may not be familiar with the flexibility allowed, as long as minimum criteria is met and there is a plan to finish.
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1 reply by Sandeep Kashyap
Aug 19, 2025 4:22 AM
Sandeep Kashyap
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Really well put, Aaron. Transparency and context truly make the difference when navigating those tough trade-offs. Thanks for sharing your perspective.
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Luis Branco CEO| Business Insight, Consultores de Gestão, Ldª Carcavelos, Lisboa, Portugal

Sandeep Kashyap
In Portugal, there is a popular saying that illustrates this phenomenon well: “the tail is the hardest part to skin.”
The idea behind this expression is simple — at the end of a process that seemed under control, when everything looked already on track, the hardest, most demanding, and most delicate part appears.

In the context of projects, that “last piece” concentrates several reasons:
- Demand for detail: the last 5% is not just “more of the same” — it involves validations, fine-tuning, and integrations, where mistakes become more visible and costly.
- Effect of fatigue: teams reach the end already tired, and the pressure to deliver increases the perceived effort.
- High expectations: stakeholders expect perfection in the final phase because that is what remains visible and “goes down in history.”
- Invisible tasks: many closing activities (documentation, testing, handover, lessons learned) may lack glamour, but they are critical and time-consuming.

The saying was created precisely to capture this feeling that the beginning may be fast, but the end requires dexterity, patience, and rigor.
pplied to project management, it reminds us that closure is not a residual stage — it is where the overall quality is ultimately proven.

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Sandeep Kashyap CEO| ProofHub India
Aug 18, 2025 10:01 AM
Replying to Kiron Bondale
...
If the team embraces one of the tenets of adaptive approaches it would definitely use level of risk as a prioritization criterion for work items and tackle some of the riskiest items early on to reduce the cost of failure and to increase the level of confidence as time passes.

Kiron
Absolutely, Kiron. Addressing high-risk items early is definitely the key to make the final stretch more manageable. These hidden dependencies that show up later are often the real culprits, and that’s what makes the final 5% so tricky.
avatar
Sandeep Kashyap CEO| ProofHub India
Aug 19, 2025 12:33 AM
Replying to Aaron Porter
...
How would I recommend balancing that trade-off without losing stakeholder trust?

Transparency. Open, honest communication, and no attempt to bias the decision. I only make a recommendation if they ask (for the most part). It's a conversation something along the lines of, "Here's where we're at, here's the impact if we can't go live without this, here's the impact if we wait until after launch to fix and implement this ... (allow time for questions) ... How would you like to proceed?"

I said "for the most part" because, for example, there are times when it's better to deliver something functional by a constraining deadline, such as compliance, than to miss the deadline and not be able to communicate with the compliance authority when we'll be able to launch. The sponsor is usually aware of compliance dates, but may not be familiar with the flexibility allowed, as long as minimum criteria is met and there is a plan to finish.
Really well put, Aaron. Transparency and context truly make the difference when navigating those tough trade-offs. Thanks for sharing your perspective.
avatar
Sandeep Kashyap CEO| ProofHub India
Aug 18, 2025 11:46 AM
Replying to Lissette Indhira Pimentel Sosa
...

The last 5% of a project often slows down completion because it sometimes involves the most complex and unpredictable work. Early stages are about building the bulk of deliverables, but the final stretch is where:
- Details matter most, polishing, fine-tuning, and integrating take more time than expected.
- Dependencies pile up, final tasks often rely on everything else being finished and aligned.
- Hidden issues appear, testing, quality checks, or stakeholder reviews reveal gaps that need fixes.
- Perception of “almost done”, teams may underestimate the effort left, leading to delays.
In short, the “last mile” is not just finishing tasks; it’s ensuring everything works together, meets quality standards, and satisfies stakeholders, making it disproportionately slower than the earlier 95%.

I couldn’t agree more, the ‘last mile’ is mostly about integration, polish, and quality assurance, often the trickiest parts of the project. I like how you framed it as ensuring everything works together. You really need strong cross-team alignment and discipline in reviews to make that last part as easy as possible.
avatar
Sandeep Kashyap CEO| ProofHub India
Aug 18, 2025 10:11 PM
Replying to Pavan Maddi
...
The final stretch is tough due to scope creep, burnout, and complex tasks. Keep momentum by breaking down tasks, celebrating wins, prioritizing, and clear communication.

Support the team and manage scope tightly!
Pavan, I completely agree, scope creep and burnout can silently eat away at the final stretch. I like your point about celebrating small wins; it really does recharge morale when energy levels dip. From your experience, which has been harder to manage in the final 5%, scope creep or team burnout?
avatar
Thomas Walenta Global Project Economy Expert Hackenheim, Germany

Good potential sources why work piles up at the end of a project. I might add
- team members already leaving the project for the next, mentally first then physically
- "Is it urgent? If no, let's delay it" syndrome
- The customer/user sees more and more of what he will get and doesn't like it/parts of it, lack of expectation management, could be mitigated by iterative delivery
- Testing reveals quality gaps, maybe introduced by shortcuts in the 95%

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1 reply by Sandeep Kashyap
Aug 25, 2025 8:17 AM
Sandeep Kashyap
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I completely agree with the point about people leaving mentally before they leave physically, that’s such a common reason momentum drops. And yes, testing exposing earlier shortcuts is another big one.



Do you think better expectation-setting with clients early on could reduce a lot of this last-minute drag?

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